AMENDED AND RESTATED SECURITY AGREEMENT


     THIS AMENDED AND RESTATED SECURITY AGREEMENT (the "Agreement"),  is entered
into  and  made  effective  as  of  December  27,  2005,  by  and  between  TECH
LABORATORIES,  INC.,  a New  Jersey  corporation  with  its  principal  place of
business located at 955 Belmont Avenue, North Haledon, NJ 07508 (the "Company"),
and the  BUYER(S)  listed on  Schedule I  attached  to the  Securities  Purchase
Agreement dated the date hereof (the "Secured Party").

     WHEREAS,  the  Company  issued to the Secured  Party a secured  convertible
debenture in the original  principal amount of Four Hundred Twenty Thousand Five
Hundred  Fourteen  Dollars  ($420,514)  (the  "Amended and Restated  Convertible
Debenture"),  plus accrued and unpaid interest, which was issued pursuant to the
Securities Purchase Agreement dated April 22, 2005, reflecting the consolidation
of the secured debenture issued by the Company to Cornell Capital  Partners,  LP
("Cornell") on May 17, 2004 in the original  principal  amount Two Hundred Fifty
Thousand Dollars ($250,000) plus accrued and unpaid interest, which was assigned
from Cornell to the Secured Party on or about March 29, 2005, and the additional
funding by the Secured Party in the amount of One Hundred Sixty Thousand Dollars
($160,000)  on April 22,  2005.  This  Agreement  shall  amend and  restate  the
Security  Agreement  between the  Company and the Secured  Party dated April 22,
2005;

     WHEREAS,  the Company has requested  the Secured  Party to make  additional
financing available to the Company;

     WHEREAS,  the Secured Party is willing to provide such additional financing
on the condition that such additional  financing is secured  hereunder and under
the  UCC-1  filed  on May 6,  2005  (#2296880-7)  filed in  connection  with the
Securities Purchase Agreement dated April 22, 2005;

     WHEREAS, the Company shall issue and sell to the Secured Party, as provided
in the  Securities  Purchase  Agreement  dated the date hereof,  and the Secured
Party shall purchase up to Three Hundred Thousand Dollars  ($300,000) of fifteen
percent (15%) secured  convertible  debentures (the  "Convertible  Debentures"),
which shall be convertible  into shares of the Company's common stock, par value
$0.01 per share (the "Common Stock") (as converted,  the "Conversion Shares") in
the  respective  amounts set forth  opposite  each  Buyer(s)  name on Schedule I
attached to the Securities Purchase Agreement;

     WHEREAS,  to  induce  the  Secured  Party  to enter  into  the  transaction
contemplated  by the  Securities  Purchase  Agreement,  the Secured  Convertible
Debenture,   the  Amended  and  Restated  Convertible  Debenture,  the  Investor
Registration Rights Agreement,  the Pledge and Escrow Agreement,  and the Escrow
Agreement (collectively referred to as the "Transaction Documents"), the Company
hereby  grants to the  Secured  Party a security  interest in and to the pledged
property  identified  on  Exhibit  A  hereto  (collectively  referred  to as the
"Pledged Property") until the satisfaction of the Obligations, as defined herein
below.




     NOW,  THEREFORE,  in consideration of the premises and the mutual covenants
herein contained,  and for other good and valuable  consideration,  the adequacy
and receipt of which are hereby acknowledged, the parties hereto hereby agree as
follows:

                                   ARTICLE 1.

                         DEFINITIONS AND INTERPRETATIONS

     Section 1.1. Recitals.

     The above  recitals are true and correct and are  incorporated  herein,  in
their entirety, by this reference.

     Section 1.2. Interpretations.

     Nothing  herein  expressed  or implied is intended or shall be construed to
confer upon any person other than the Secured  Party any right,  remedy or claim
under or by reason hereof.

     Section 1.3. Obligations Secured.

     The  obligations  secured hereby are any and all obligations of the Company
now  existing or  hereinafter  incurred to the Secured  Party,  whether  oral or
written  and whether  arising  before,  on or after the date  hereof  including,
without limitation,  those obligations of the Company to the Secured Party under
this  Agreement,  the Securities  Purchase  Agreement,  the Secured  Convertible
Debenture,  the Investor  Registration Rights Agreement and Irrevocable Transfer
Agent Instructions,  the Amended and Restated Convertible Debenture, the Warrant
dated April 22, 2005 and any other amounts now or hereafter  owed to the Secured
Party by the Company thereunder or hereunder (collectively, the "Obligations").

                                   ARTICLE 2.

                PLEDGED COLLATERAL, ADMINISTRATION OF COLLATERAL
                      AND TERMINATION OF SECURITY INTEREST

     Section 2.1. Pledged Property.

          (a) Company hereby  pledges to the Secured  Party,  and creates in the
     Secured Party for its benefit,  a security interest for such time until the
     Obligations  are paid in full, in and to all of the property of the Company
     as set forth in Exhibit "A"  attached  hereto  (collectively,  the "Pledged
     Property"):

     The Pledged Property,  as set forth in Exhibit "A" attached hereto, and the
products thereof and the proceeds of all such items are hereinafter collectively
referred to as the "Pledged Collateral."

          (b) Simultaneously  with the execution and delivery of this Agreement,
     the Company shall make, execute,  acknowledge,  file, record and deliver to
     the Secured Party any documents  reasonably  requested by the Secured Party
     to perfect its security  interest in the Pledged  Property.  Simultaneously



                                       2

     with the execution and delivery of this Agreement,  the Company shall make,
     execute,  acknowledge  and deliver to the Secured Party such  documents and
     instruments,   including,   without   limitation,   financing   statements,
     certificates,   affidavits  and  forms  as  may,  in  the  Secured  Party's
     reasonable judgment, be necessary to effectuate, complete or perfect, or to
     continue and  preserve,  the security  interest of the Secured Party in the
     Pledged  Property,  and the  Secured  Party shall hold such  documents  and
     instruments as secured party, subject to the terms and conditions contained
     herein.

     Section 2.2. Rights; Interests; Etc.

          (a) So long as no Event of Default (as hereinafter defined) shall have
     occurred and be continuing:

               (i) the Company  shall be entitled to exercise any and all rights
          pertaining to the Pledged Property or any part thereof for any purpose
          not inconsistent with the terms hereof; and

               (ii) the Company  shall be entitled to receive and retain any and
          all payments paid or made in respect of the Pledged Property.

          (b) Upon the  occurrence  and  during the  continuance  of an Event of
     Default:

               (i) All rights of the  Company to  exercise  the rights  which it
          would otherwise be entitled to exercise  pursuant to Section 2.2(a)(i)
          hereof and to receive  payments which it would otherwise be authorized
          to receive and retain pursuant to Section  2.2(a)(ii)  hereof shall be
          suspended,  and all such rights shall  thereupon  become vested in the
          Secured Party who shall thereupon have the sole right to exercise such
          rights and to receive and hold as Pledged  Collateral  such  payments;
          provided, however, that if the Secured Party shall become entitled and
          shall elect to exercise its right to realize on the Pledged Collateral
          pursuant  to  Article 5 hereof,  then all cash  sums  received  by the
          Secured Party, or held by Company for the benefit of the Secured Party
          and paid over pursuant to Section 2.2(b)(ii) hereof,  shall be applied
          against any outstanding Obligations; and

               (ii) All  interest,  dividends,  income  and other  payments  and
          distributions  which  are  received  by the  Company  contrary  to the
          provisions of Section  2.2(b)(i) hereof shall be received in trust for
          the  benefit of the  Secured  Party,  shall be  segregated  from other
          property  of the  Company  and  shall be  forthwith  paid  over to the
          Secured Party; or

               (iii)  The  Secured  Party  in  its  sole  discretion   shall  be
          authorized  to sell any or all of the  Pledged  Property  at public or
          private sale in order to recoup all of the outstanding  principal plus
          accrued  interest  owed  pursuant  to  the  Convertible  Debenture  as
          described herein

          (c) An "Event of Default"  shall be deemed to have occurred under this
     Agreement upon an Event of Default under the Convertible Debentures.



                                       3


                               ARTICLE 3.

                          ATTORNEY-IN-FACT; PERFORMANCE

     Section 3.1.      Secured Party Appointed Attorney-In-Fact.
                       ----------------------------------------

     Upon the occurrence of an Event of Default, the Company hereby appoints the
Secured  Party as its  attorney-in-fact,  with full  authority  in the place and
stead of the Company and in the name of the Company or  otherwise,  from time to
time in the  Secured  Party's  discretion  to take any action and to execute any
instrument  which the Secured Party may reasonably  deem necessary to accomplish
the purposes of this Agreement,  including,  without limitation,  to receive and
collect all instruments made payable to the Company representing any payments in
respect of the Pledged Collateral or any part thereof and to give full discharge
for the same.  The  Secured  Party may demand,  collect,  receipt  for,  settle,
compromise,  adjust, sue for,  foreclose,  or realize on the Pledged Property as
and when the Secured Party may determine. To facilitate collection,  the Secured
Party may notify account debtors and obligors on any Pledged Property or Pledged
Collateral to make payments directly to the Secured Party.

     Section 3.2. Secured Party May Perform.

     If the Company fails to perform any agreement contained herein, the Secured
Party,  at its  option,  may  itself  perform,  or cause  performance  of,  such
agreement,  and  the  expenses  of the  Secured  Party  incurred  in  connection
therewith shall be included in the Obligations secured hereby and payable by the
Company under Section 8.3.

                                   ARTICLE 4.

                         REPRESENTATIONS AND WARRANTIES

     Section 4.1. Authorization; Enforceability.

     Each of the parties  hereto  represents  and warrants that it has taken all
action  necessary to authorize the execution,  delivery and  performance of this
Agreement  and the  transactions  contemplated  hereby;  and upon  execution and
delivery,  this Agreement shall constitute a valid and binding obligation of the
respective party, subject to applicable bankruptcy, insolvency,  reorganization,
moratorium  and similar laws  affecting  creditors'  rights or by the principles
governing the availability of equitable remedies.

         Section 4.2.      Ownership of Pledged Property.

     The Company  warrants and  represents  that it is the legal and  beneficial
owner of the Pledged  Property  free and clear of any lien,  security  interest,
option or other charge or encumbrance  except for the security  interest created
by this Agreement.



                                       4

                                   ARTICLE 5.

                    DEFAULT; REMEDIES; SUBSTITUTE COLLATERAL

     Section 5.1. Default and Remedies.

          (a) If an Event of Default  described  in Section  2.2(c)(i)  and (ii)
     occurs,  then  in  each  such  case  the  Secured  Party  may  declare  the
     Obligations  to be due and payable  immediately,  by a notice in writing to
     the Company,  and upon any such  declaration,  the Obligations shall become
     immediately due and payable.  If an Event of Default  described in Sections
     2.2(c)(iii)  or (iv)  occurs  and is  continuing  for the  period set forth
     therein,  then the Obligations shall  automatically  become immediately due
     and  payable  without  declaration  or other act on the part of the Secured
     Party.

          (b) Upon the  occurrence  of an Event of Default,  the  Secured  Party
     shall:  (i) be entitled to receive all  distributions  with  respect to the
     Pledged  Collateral,  (ii) to cause the Pledged  Property to be transferred
     into the name of the Secured Party or its nominee,  (iii) to dispose of the
     Pledged  Property,  and  (iv) to  realize  upon any and all  rights  in the
     Pledged Property then held by the Secured Party.

     Section 5.2. Method of Realizing Upon the Pledged Property: Other Remedies.
                  -------------------------------------------------------------

     Upon the  occurrence of an Event of Default,  in addition to any rights and
remedies  available at law or in equity,  the following  provisions shall govern
the Secured Party's right to realize upon the Pledged Property:

          (a) Any  item of the  Pledged  Property  may be sold for cash or other
     value in any number of lots at  brokers  board,  public  auction or private
     sale and may be sold without demand,  advertisement  or notice (except that
     the Secured  Party  shall give the  Company  ten (10) days'  prior  written
     notice of the time and place or of the time after which a private  sale may
     be made (the "Sale  Notice")),  which notice  period is hereby agreed to be
     commercially reasonable.  At any sale or sales of the Pledged Property, the
     Company  may bid for and  purchase  the  whole or any  part of the  Pledged
     Property  and,  upon  compliance  with the  terms of such  sale,  may hold,
     exploit  and  dispose of the same  without  further  accountability  to the
     Secured  Party.  The  Company  will  execute  and  deliver,  or cause to be
     executed and delivered, such instruments,  documents, assignments, waivers,
     certificates,  and  affidavits  and  supply  or cause to be  supplied  such
     further  information  and take such  further  action as the  Secured  Party
     reasonably shall require in connection with any such sale.

          (b) Any cash being held by the Secured Party as Pledged Collateral and
     all cash  proceeds  received by the  Secured  Party in respect of, sale of,
     collection  from, or other  realization upon all or any part of the Pledged
     Collateral shall be applied as follows:

               (i) to the payment of all  amounts due the Secured  Party for the
          expenses  reimbursable  to it  hereunder  or  owed to it  pursuant  to
          Section 8.3 hereof;

               (ii) to the payment of the Obligations then due and unpaid.



                                       5

               (iii) the  balance,  if any,  to the person or  persons  entitled
          thereto, including, without limitation, the Company.

          (c) In  addition to all of the rights and  remedies  which the Secured
     Party may have pursuant to this Agreement, the Secured Party shall have all
     of the rights and remedies provided by law, including,  without limitation,
     those under the Uniform Commercial Code.

               (i) If the  Company  fails  to pay  such  amounts  due  upon  the
          occurrence  of an  Event of  Default  which  is  continuing,  then the
          Secured Party may institute a judicial  proceeding  for the collection
          of the  sums so due and  unpaid,  may  prosecute  such  proceeding  to
          judgment or final  decree and may enforce the same against the Company
          and collect the monies adjudged or decreed to be payable in the manner
          provided by law out of the property of Company, wherever situated.

               (ii)  The  Company  agrees  that  it  shall  be  liable  for  any
          reasonable  fees,  expenses and costs incurred by the Secured Party in
          connection  with  enforcement,  collection  and  preservation  of  the
          Transaction Documents, including, without limitation, reasonable legal
          fees and  expenses,  and such  amounts  shall be  deemed  included  as
          Obligations  secured  hereby and  payable as set forth in Section  8.3
          hereof.

     Section 5.3. Proofs of Claim.

     In case  of the  pendency  of any  receivership,  insolvency,  liquidation,
bankruptcy,  reorganization,   arrangement,  adjustment,  composition  or  other
judicial proceeding relating to the Company or the property of the Company or of
such other obligor or its creditors,  the Secured Party (irrespective of whether
the  Obligations  shall  then be due and  payable  as  therein  expressed  or by
declaration  or otherwise  and  irrespective  of whether the Secured Party shall
have made any demand on the Company for the payment of the Obligations), subject
to the rights of Previous Security Holders, shall be entitled and empowered,  by
intervention in such proceeding or otherwise:

               (i) to file  and  prove  a claim  for  the  whole  amount  of the
          Obligations  and to file  such  other  papers or  documents  as may be
          necessary  or  advisable  in order to have the  claims of the  Secured
          Party  (including any claim for the reasonable legal fees and expenses
          and other  expenses  paid or incurred by the Secured  Party  permitted
          hereunder   and  of  the  Secured   Party  allowed  in  such  judicial
          proceeding), and

               (ii) to collect and receive any monies or other property  payable
          or  deliverable on any such claims and to distribute the same; and any
          custodian,  receiver, assignee, trustee,  liquidator,  sequestrator or
          other  similar  official  in any such  judicial  proceeding  is hereby
          authorized  by the Secured  Party to make such payments to the Secured
          Party and,  in the event that the Secured  Party shall  consent to the
          making of such payments  directed to the Secured Party,  to pay to the
          Secured Party any amounts for expenses due it hereunder.

     Section 5.4. Duties Regarding Pledged Collateral.

               The  Secured  Party  shall have no duty as to the  collection  or
          protection of the Pledged  Property or any income thereon or as to the
          preservation of any rights pertaining thereto, beyond the safe custody



                                       6

          and  reasonable  care of any of the Pledged  Property  actually in the
          Secured Party's possession.

                                   ARTICLE 6.

                              AFFIRMATIVE COVENANTS

     The Company  covenants and agrees that,  from the date hereof and until the
Obligations  have been fully paid and satisfied,  unless the Secured Party shall
consent otherwise in writing (as provided in Section 8.4 hereof):

     Section 6.1. Existence, Properties, Etc.

          (a) The Company shall do, or cause to be done, all things,  or proceed
     with due  diligence  with any  actions or  courses  of action,  that may be
     reasonably  necessary  (i) to maintain  Company's due  organization,  valid
     existence and good standing  under the laws of its state of  incorporation,
     and (ii) to preserve and keep in full force and effect all  qualifications,
     licenses and  registrations in those  jurisdictions in which the failure to
     do so could have a Material Adverse Effect (as defined below);  and (b) the
     Company shall not do, or cause to be done,  any act impairing the Company's
     corporate power or authority (i) to carry on the Company's  business as now
     conducted,  and (ii) to  execute  or deliver  this  Agreement  or any other
     document delivered in connection herewith,  including,  without limitation,
     any UCC-1 Financing Statements required by the Secured Party to which it is
     or  will  be a  party,  or  perform  any of its  obligations  hereunder  or
     thereunder.  For  purpose of this  Agreement,  the term  "Material  Adverse
     Effect" shall mean any material and adverse affect as determined by Secured
     Party in its sole  discretion,  whether  individually  or in the aggregate,
     upon  (a)  the  Company's  assets,  business,  operations,   properties  or
     condition, financial or otherwise; (b) the Company's to make payment as and
     when  due of all  or any  part  of  the  Obligations;  or (c)  the  Pledged
     Property.

     Section 6.2. Financial Statements and Reports.

     The Company  shall  furnish to the Secured  Party within a reasonable  time
such  financial  data as the Secured Party may  reasonably  request,  including,
without limitation, the following:

          (a) The  balance  sheet of the  Company as of the close of each fiscal
     year, the statement of earnings and retained  earnings of the Company as of
     the close of such fiscal year,  and statement of cash flows for the Company
     for such fiscal year, all in reasonable detail, prepared in accordance with
     generally accepted accounting principles consistently applied, certified by
     the chief  executive and chief  financial  officers of the Company as being
     true and correct and  accompanied by a certificate  of the chief  executive
     and chief financial  officers of the Company,  stating that the Company has
     kept, observed,  performed and fulfilled each covenant,  term and condition
     of this  Agreement  during  such  fiscal  year and that no Event of Default
     hereunder  has  occurred and is  continuing,  or if an Event of Default has
     occurred and is  continuing,  specifying  the nature of same, the period of
     existence of same and the action the Company proposes to take in connection
     therewith;

          (b) A balance sheet of the Company as of the close of each month,  and
     statement of earnings and retained  earnings of the Company as of the close
     of such month,  all in reasonable  detail,  and prepared  substantially  in



                                       7

     accordance  with  generally  accepted  accounting  principles  consistently
     applied,  certified by the chief executive and chief financial  officers of
     the Company as being true and correct; and

          (c) Copies of all  accountants'  reports  and  accompanying  financial
     reports  submitted to the Company by independent  accountants in connection
     with each annual examination of the Company.

     Section 6.3. Accounts and Reports.

     The Company  shall  maintain a standard  system of accounting in accordance
with generally accepted accounting principles  consistently applied and provide,
at its sole expense, to the Secured Party the following:

          (a) as soon as available,  a copy of any notice or other communication
     alleging  any  nonpayment  or other  material  breach  or  default,  or any
     foreclosure or other action  respecting any material  portion of its assets
     and properties,  received respecting any of the indebtedness of the Company
     in excess of $15,000 (other than the  Obligations),  or any demand or other
     request for payment under any guaranty,  assumption,  purchase agreement or
     similar agreement or arrangement respecting the indebtedness or obligations
     of others in excess of  $15,000,  including  any  received  from any person
     acting on behalf of the Secured Party or beneficiary thereof; and

          (b) within  fifteen (15) days after the making of each  submission  or
     filing,  a  copy  of any  report,  financial  statement,  notice  or  other
     document,  whether periodic or otherwise,  submitted to the shareholders of
     the Company,  or submitted to or filed by the Company with any governmental
     authority involving or affecting (i) the Company that could have a Material
     Adverse  Effect;  (ii)  the  Obligations;  (iii)  any  part of the  Pledged
     Collateral;  or (iv) any of the transactions contemplated in this Agreement
     or the Loan Instruments.

     Section   6.4.    Maintenance    of   Books   and   Records;    Inspection.
                       ---------------------------------------------------------

     The Company  shall  maintain its books,  accounts and records in accordance
with generally accepted accounting  principles  consistently applied, and permit
the Secured Party, its officers and employees and any  professionals  designated
by the  Secured  Party in  writing,  at any time to visit and inspect any of its
properties  (including but not limited to the collateral  security  described in
the  Transaction  Documents  and/or the Loan  Instruments),  corporate books and
financial  records,  and to discuss its accounts,  affairs and finances with any
employee, officer or director thereof.

     Section 6.5. Maintenance and Insurance.

          (a) The Company shall maintain or cause to be  maintained,  at its own
     expense,  all of its  assets  and  properties  in good  working  order  and
     condition,   making  all  necessary   repairs   thereto  and  renewals  and
     replacements thereof.

          (b) The Company shall maintain or cause to be  maintained,  at its own
     expense,  insurance in form, substance and amounts (including deductibles),
     which the Company deems reasonably necessary to the Company's business, (i)



                                       8

     adequate to insure all assets and  properties of the Company,  which assets
     and properties are of a character usually insured by persons engaged in the
     same or similar  business  against  loss or damage  resulting  from fire or
     other risks included in an extended  coverage  policy;  (ii) against public
     liability and other tort claims that may be incurred by the Company;  (iii)
     as may be required by the Transaction  Documents and/or  applicable law and
     (iv) as may be reasonably  requested by Secured  Party,  all with adequate,
     financially sound and reputable insurers.

     Section 6.6. Contracts and Other Collateral.

     The Company shall perform all of its  obligations  under or with respect to
each  instrument,  receivable,  contract  and other  intangible  included in the
Pledged  Property  to which the Company is now or  hereafter  will be party on a
timely basis and in the manner therein required,  including, without limitation,
this Agreement.

     Section 6.7. Defense of Collateral, Etc.

     The Company  shall defend and enforce its right,  title and interest in and
to any part of: (a) the Pledged  Property;  and (b) if not  included  within the
Pledged  Property,  those assets and properties whose loss could have a Material
Adverse Effect,  the Company shall defend the Secured  Party's right,  title and
interest in and to each and every part of the Pledged Property, each against all
manner of claims and demands on a timely  basis to the full extent  permitted by
applicable law.

     Section 6.8. Payment of Debts, Taxes, Etc.

     The Company  shall pay, or cause to be paid,  all of its  indebtedness  and
other liabilities and perform, or cause to be performed,  all of its obligations
in accordance with the respective terms thereof, and pay and discharge, or cause
to be paid or discharged,  all taxes, assessments and other governmental charges
and levies  imposed upon it, upon any of its assets and  properties on or before
the last day on which the same may be paid without  penalty,  as well as pay all
other  lawful  claims  (whether  for  services,  labor,  materials,  supplies or
otherwise) as and when due

     Section 6.9. Taxes and Assessments; Tax Indemnity.

     The  Company  shall  (a) file all tax  returns  and  appropriate  schedules
thereto that are required to be filed under applicable law, prior to the date of
delinquency,  (b) pay and  discharge  all taxes,  assessments  and  governmental
charges or levies imposed upon the Company,  upon its income and profits or upon
any  properties  belonging  to it, prior to the date on which  penalties  attach
thereto,  and (c) pay all taxes,  assessments and governmental charges or levies
that,  if  unpaid,  might  become a lien or charge  upon any of its  properties;
provided,  however,  that the  Company in good faith may  contest  any such tax,
assessment,  governmental  charge or levy described in the foregoing clauses (b)
and (c) so long as appropriate reserves are maintained with respect thereto.

     Section    6.10.    Compliance    with    Law   and    Other    Agreements.
                         -------------------------------------------------------

     The Company shall  maintain its business  operations  and property owned or
used in connection  therewith in  compliance  with (a) all  applicable  federal,



                                       9

state and  local  laws,  regulations  and  ordinances  governing  such  business
operations and the use and ownership of such property,  and (b) all  agreements,
licenses,  franchises,  indentures and mortgages to which the Company is a party
or by which the Company or any of its properties is bound.  Without limiting the
foregoing,  the Company shall pay all of its indebtedness promptly in accordance
with the terms thereof.

     Section 6.11. Notice of Default.
                   -----------------

     The  Company  shall  give  written  notice  to  the  Secured  Party  of the
occurrence  of any  default  or Event  of  Default  under  this  Agreement,  the
Transaction  Documents or any other Loan  Instrument  or any other  agreement of
Company for the payment of money, promptly upon the occurrence thereof.

     Section 6.12. Notice of Litigation.
                   --------------------

     The Company shall give notice, in writing,  to the Secured Party of (a) any
actions,  suits or  proceedings  wherein  the  amount  at issue is in  excess of
$50,000,  instituted by any persons against the Company, or affecting any of the
assets of the Company,  and (b) any dispute,  not resolved  within  fifteen (15)
days of the  commencement  thereof,  between the Company on the one hand and any
governmental  or regulatory  body on the other hand,  which might  reasonably be
expected  to have a  Material  Adverse  Effect  on the  business  operations  or
financial condition of the Company.

                                   ARTICLE 7.

                               NEGATIVE COVENANTS

     The Company  covenants  and agrees  that,  from the date  hereof  until the
Obligations  have been fully paid and satisfied,  the Company shall not,  unless
the Secured Party shall consent otherwise in writing:

     Section 7.1. Indebtedness.

     The Company shall not directly or indirectly permit, create, incur, assume,
permit to exist,  increase,  renew or  extend  on or after the date  hereof  any
indebtedness  on its  part,  including  commitments,  contingencies  and  credit
availabilities,  or apply  for or  offer  or  agree  to do any of the  foregoing
(excluding any indebtedness of the Company to the Secured Party,  trade accounts
payable and accrued expenses incurred in the ordinary course of business and the
endorsement of negotiable  instruments payable to the Company,  respectively for
deposit or collection in the ordinary course of business).

     Section 7.2. Liens and Encumbrances.

     The Company shall not directly or indirectly make, create, incur, assume or
permit to exist any assignment, transfer, pledge, mortgage, security interest or
other  lien or  encumbrance  of any  nature  in, to or  against  any part of the
Pledged Property or of the Company's  capital stock, or offer or agree to do so,
or own or acquire or agree to acquire  any asset or  property  of any  character
subject to any of the foregoing  encumbrances  (including any  conditional  sale



                                       10

contract or other title retention  agreement),  or assign,  pledge or in any way
transfer or encumber  its right to receive any income or other  distribution  or
proceeds from any part of the Pledged  Property or the Company's  capital stock;
or enter into any  sale-leaseback  financing  respecting any part of the Pledged
Property as lessee,  or cause or assist the inception or  continuation of any of
the foregoing.

     Section   7.3.    Certificate   of   Incorporation,    By-Laws,    Mergers,
                       Consolidations, Acquisitions and Sales.
                       ---------------------------------------------------------

     Without the prior express written consent of the Secured Party, the Company
shall not: (a) Amend its Certificate of Incorporation  or By-Laws;  (b) issue or
sell its stock,  stock options,  bonds,  notes or other corporate  securities or
obligations;   (c)  be  a  party  to  any  merger,  consolidation  or  corporate
reorganization,  (d) purchase or otherwise  acquire all or substantially  all of
the assets or stock of, or any  partnership  or joint  venture  interest in, any
other  person,  firm or entity,  (e) sell,  transfer,  convey,  grant a security
interest in or lease all or any substantial  part of its assets,  nor (f) create
any subsidiaries nor convey any of its assets to any subsidiary.

     Section 7.4. Management, Ownership.

     The Company shall not materially  change its ownership,  executive staff or
management  without  the  prior  written  consent  of  the  Secured  Party.  The
ownership, executive staff and management of the Company are material factors in
the Secured Party's willingness to institute and maintain a lending relationship
with the Company.

     Section 7.5. Dividends, Etc.

     The Company  shall not declare or pay any dividend of any kind,  in cash or
in property, on any class of its capital stock, nor purchase,  redeem, retire or
otherwise  acquire for value any shares of such stock, nor make any distribution
of any kind in respect thereof,  nor make any return of capital to shareholders,
nor make any payments in respect of any  pension,  profit  sharing,  retirement,
stock option,  stock bonus,  incentive  compensation  or similar plan (except as
required  or  permitted  hereunder),  without the prior  written  consent of the
Secured Party.

     Section 7.6. Guaranties; Loans.

     The  Company  shall not  guarantee  nor be liable  in any  manner,  whether
directly or  indirectly,  or become  contingently  liable after the date of this
Agreement in connection  with the  obligations or  indebtedness of any person or
persons,  except  for  (i)  the  indebtedness  currently  secured  by the  liens
identified on the Pledged  Property  identified on Exhibit A hereto and (ii) the
endorsement  of  negotiable  instruments  payable to the  Company for deposit or
collection  in the ordinary  course of business.  The Company shall not make any
loan,  advance or  extension  of credit to any  person  other than in the normal
course of its business.

     Section 7.7. Conduct of Business.

     The Company will continue to engage, in an efficient and economical manner,
in a business of the same  general  type as  conducted by it on the date of this
Agreement.



                                       11

     Section 7.8. Places of Business.

     The Company  shall not change the  location of its chief place of business,
chief executive  office or any place of business  disclosed to the Secured Party
or move any of the Pledged  Property from its current  location  without  thirty
(30) days' prior written notice to the Secured Party in each instance.

                                   ARTICLE 8.

                                  MISCELLANEOUS

     Section 8.1. Notices.

     All  notices or other  communications  required  or  permitted  to be given
pursuant to this  Agreement  shall be in writing and shall be considered as duly
given on:  (a) the date of  delivery,  if  delivered  in person,  by  nationally
recognized  overnight  delivery  service or (b) five (5) days  after  mailing if
mailed from within the  continental  United  States by  certified  mail,  return
receipt requested to the party entitled to receive the same:

      If to the Secured Party:              Montgomery Equity Partners, Ltd.
                                            101 Hudson Street-Suite 3700
                                            Jersey City, New Jersey 07302
                                            Attention:        Mark Angelo
                                                              Portfolio Manager
                                            Telephone:        (201) 986-8300
                                            Facsimile:        (201) 985-8266

      With a copy to:                       David Gonzalez, Esq.
                                            101 Hudson Street, Suite 3700
                                            Jersey City, NJ 07302
                                            Telephone:        (201) 985-8300
                                            Facsimile:        (201) 985-8266



      And if to the Company:                Tech Laboratories, Inc.
                                            c/o Anslow & Jaclin, LLP
                                            195 Route 9 South, Suite 204
                                            Manalapan, NJ 07726
                                            Attention:        Gregg E. Jaclin
                                            Telephone:        (973) 427-5333

     Any party may  change  its  address  by  giving  notice to the other  party
stating its new address.  Commencing on the tenth (10th) day after the giving of
such notice, such newly designated address shall be such party's address for the
purpose of all notices or other communications required or permitted to be given
pursuant to this Agreement.



                                       12

     Section 8.2. Severability.

     If any provision of this Agreement shall be held invalid or  unenforceable,
such  invalidity  or  unenforceability  shall attach only to such  provision and
shall not in any  manner  affect or render  invalid or  unenforceable  any other
severable  provision of this Agreement,  and this Agreement shall be carried out
as if any such invalid or unenforceable provision were not contained herein.

     Section 8.3. Expenses.

     In the event of an Event of Default,  the  Company  will pay to the Secured
Party the amount of any and all  reasonable  expenses,  including the reasonable
fees  and  expenses  of its  counsel,  which  the  Secured  Party  may  incur in
connection  with: (i) the custody or  preservation  of, or the sale,  collection
from, or other realization upon, any of the Pledged Property;  (ii) the exercise
or enforcement of any of the rights of the Secured Party  hereunder or (iii) the
failure by the Company to perform or observe any of the provisions hereof.

     Section 8.4. Waivers, Amendments, Etc.

     The  Secured  Party's  delay or failure at any time or times  hereafter  to
require  strict  performance  by  Company  of any  undertakings,  agreements  or
covenants shall not waiver,  affect,  or diminish any right of the Secured Party
under this Agreement to demand strict compliance and performance  herewith.  Any
waiver by the  Secured  Party of any Event of Default  shall not waive or affect
any other Event of Default, whether such Event of Default is prior or subsequent
thereto and whether of the same or a different type.  None of the  undertakings,
agreements  and  covenants of the Company  contained in this  Agreement,  and no
Event of Default,  shall be deemed to have been waived by the Secured Party, nor
may this  Agreement  be  amended,  changed  or  modified,  unless  such  waiver,
amendment,  change or  modification  is  evidenced by an  instrument  in writing
specifying  such waiver,  amendment,  change or  modification  and signed by the
Secured Party.

     Section 8.5. Continuing Security Interest.

     This Agreement shall create a continuing  security  interest in the Pledged
Property and shall: (i) remain in full force and effect until payment in full of
the  Obligations;  and (ii) be binding upon the Company and its  successors  and
heirs and (iii) inure to the benefit of the Secured Party and its successors and
assigns.  Upon the  payment  or  satisfaction  in full of the  Obligations,  the
Company shall be entitled to the return, at its expense,  of such of the Pledged
Property as shall not have been sold in  accordance  with  Section 5.2 hereof or
otherwise applied pursuant to the terms hereof.

     Section 8.6. Independent Representation.

     Each party hereto  acknowledges  and agrees that it has received or has had
the opportunity to receive  independent legal counsel of its own choice and that
it has been sufficiently apprised of its rights and responsibilities with regard
to the substance of this Agreement.



                                       13

     Section 8.7. Applicable Law: Jurisdiction.

     This Agreement  shall be governed by and interpreted in accordance with the
laws of the State of New Jersey  without regard to the principles of conflict of
laws.  The parties  further agree that any action between them shall be heard in
Hudson County,  New Jersey,  and expressly consent to the jurisdiction and venue
of the  Superior  Court of New Jersey,  sitting in Hudson  County and the United
States  District  Court for the  District of New Jersey  sitting in Newark,  New
Jersey  for the  adjudication  of any civil  action  asserted  pursuant  to this
Paragraph.

     Section 8.8. Waiver of Jury Trial.

     AS A FURTHER  INDUCEMENT FOR THE SECURED PARTY TO ENTER INTO THIS AGREEMENT
AND TO MAKE THE  FINANCIAL  ACCOMMODATIONS  TO THE COMPANY,  THE COMPANY  HEREBY
WAIVES ANY RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING  RELATED IN ANY WAY TO
THIS AGREEMENT AND/OR ANY AND ALL OTHER DOCUMENTS RELATED TO THIS TRANSACTION.

     Section 8.9. Entire Agreement.

     This  Agreement  constitutes  the entire  agreement  among the  parties and
supersedes any prior agreement or  understanding  among them with respect to the
subject matter hereof.



                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



                                       14

     IN WITNESS  WHEREOF,  the parties  hereto have  executed  this  Amended and
Restated Security Agreement as of the date first above written.


                                            COMPANY:
                                            TECH LABORATORIES, INC.

                                            By:/s/ Donna Silverman
                                               ---------------------
                                            Name:  Donna Silverman
                                            Title: Chief Executive Officer


                                            SECURED PARTY:
                                            MONTGOMERY EQUITY PARTNERS, LTD.

                                            By:      Yorkville Advisors, LLC
                                            Its:     General Partner

                                            By:/s/ Mark Angelo
                                               -----------------
                                            Name:  Mark Angelo
                                            Title: Portfolio Manager



                                       15

                                    EXHIBIT A
                         DEFINITION OF PLEDGED PROPERTY


     For the purpose of securing prompt and complete  payment and performance by
the  Company  of  all  of  the  Obligations,  the  Company  unconditionally  and
irrevocably hereby grants to the Secured Party a continuing security interest in
and to, and lien upon, the following Pledged Property of the Company:


          (a)  all  goods  of  the  Company,   including,   without  limitation,
     machinery,  equipment,  furniture,  furnishings,  fixtures,  signs, lights,
     tools,  parts,  supplies and motor vehicles of every kind and  description,
     now or  hereafter  owned by the Company or in which the Company may have or
     may  hereafter  acquire  any  interest,  and all  replacements,  additions,
     accessions,  substitutions and proceeds  thereof,  arising from the sale or
     disposition thereof, and where applicable, the proceeds of insurance and of
     any tort claims involving any of the foregoing;


          (b) all inventory of the Company,  including,  but not limited to, all
     goods,  wares,  merchandise,  parts,  supplies,  finished  products,  other
     tangible personal property,  including such inventory as is temporarily out
     of  Company's  custody or  possession  and  including  any returns upon any
     accounts or other proceeds,  including insurance  proceeds,  resulting from
     the sale or disposition of any of the foregoing;


          (c) all  contract  rights  and  general  intangibles  of the  Company,
     including,  without limitation,  goodwill,  trademarks, trade styles, trade
     names, leasehold interests, partnership or joint venture interests, patents
     and patent applications,  copyrights, deposit accounts whether now owned or
     hereafter created;


          (d) all documents,  warehouse receipts,  instruments and chattel paper
     of the Company  whether now owned or  hereafter  created;  shares of common
     stock or  preferred  stock owned by the  Company  whether of the Company or
     another public or private entity;


          (e) all accounts and other receivables,  instruments or other forms of
     obligations  and  rights to  payment of the  Company  (herein  collectively
     referred to as "Accounts"),  together with the proceeds thereof,  all goods
     represented by such Accounts and all such goods that may be returned by the
     Company's  customers,  and all proceeds of any insurance  thereon,  and all
     guarantees, securities and liens which the Company may hold for the payment
     of any such Accounts including,  without limitation, all rights of stoppage
     in transit, replevin and reclamation and as an unpaid vendor and/or lienor,
     all of which the  Company  represents  and  warrants  will be bona fide and
     existing obligations of its respective  customers,  arising out of the sale
     of goods by the Company in the ordinary course of business;


          (f) to the extent  assignable,  all of the Company's  rights under all
     present and future authorizations,  permits, licenses and franchises issued
     or granted in connection with the operations of any of its facilities;


          (g)  all  products  and  proceeds   (including,   without  limitation,
     insurance proceeds) from the above-described Pledged Property.


                                      A-1