ISO BLOCK PRODUCTS USA, INC.


                                     Common
                                  STOCK OPTION



         THIS COMMON STOCK  OPTION,  dated as of November 19, 1996 (the "Date of
Grant"),  is granted by ISO BLOCK  PRODUCTS  USA,  INC., a Colorado  corporation
("Company"), to JOSEF RATEY (the "Optionee"). WITNESSETH, that, in consideration
of the covenants and  agreements  herein  contained,  the parties  hereto hereby
agree as follows:

         1. Grant.  The  Company  hereby  grants to the  Optionee an option (the
"Option") to purchase 240,000 shares of the Company's  Common Stock,  $.0001 par
value per share (the "Option  Shares"),  at the price of Eighty Cents  (US$0.80)
per share (the  "Purchase  Price" or "Exercise  Price").  The Purchase Price and
number of Option  Shares  purchasable  hereunder  is  subject to  adjustment  in
accordance with Paragraph 8 hereof.

     2. Term.  The Option is  exercisable  in whole or from time to time in part
during the period beginning on November 19, 1996 and ending at 5:00 o'clock p.m.
(Eastern Time) on November 18, 1998.

         3. Exercise of Option. During the Optionee's life, this Option may only
be  exercised  by  him,  her or  it.  This  Option  may  only  be  exercised  by
presentation at the principal offices of the Company in Littleton,  Colorado, of
written notice to the Company's Secretary advising the Company of the Optionee's
election to purchase Option Shares, specifying the number of Option Shares being
purchased,  accompanied  by payment in full.  No Option  Shares  shall be issued
until full payment is made therefor.  Payment shall be made in cash, represented
by bank or cashier's check, certified check or money order.

         4.  Issuance  of Option  Shares;  Restrictive  Legend.  (a) Upon proper
exercise of this Option,  the Company shall mail or deliver to the Optionee,  as
promptly as practicable,  a stock  certificate or certificates  representing the
Option Shares  purchased,  subject to clause (b) below. The Company shall not be
required  to sell or issue any shares  under the Option if the  issuance of such
shares shall  constitute a violation of any  applicable  law or regulation or of
any  requirements of any national  securities  exchange upon which the Company's
common stock may be listed.

         (b) Upon any exercise of this Option, if a registration statement under
the  Securities  Act of 1933 (the  "Act") is not in effect  with  respect to the
Option Shares, then the Company shall not be required to issue any Option Shares
unless the Company has received  evidence  reasonably  satisfactory to it to the
effect that the Optionee is acquiring  such shares for investment and not with a
view to the  distribution  thereof or is acquiring  such shares in reliance upon
Regulation  S  (consisting  of Rules 901 through 904 under the Act) and that the
conditions  of  Regulation  S have been  satisfied  as to each  exercise of this
Option. Any reasonable  determination in this connection by the Company shall be
final, binding and conclusive.

         (c)  Unless and until  removed  as  provided  below,  each  certificate
evidencing  unregistered  Option  Shares  shall bear either a customary  form of
investment  legend (if in regard to shares purchased other than in reliance upon
Regulation S) or shall bear an appropriate form of legend if in regard to shares
purchased in reliance upon Regulation S under the Act.

     The Company  shall  issue a new  certificate  which does not  contain  such
legend if (i) the shares  represented by such  certificate are sold pursuant to,
or the shares into which the Option Shares later are converted are covered by, a
registration  statement  (including  a  current  prospectus)  which  has  become
effective  under  the Act,  or (ii) the  staff of the  Securities  and  Exchange
Commission  shall have issued a "no action" letter,  reasonably  satisfactory to
the  Company's  counsel,  to the effect  that such shares may be freely sold and
thereafter  traded  publicly  without  registration  under the Act, or (iii) the
Company's  counsel,  or other  counsel  acceptable  to the  Company,  shall have
rendered an opinion  satisfactory  to the Company to the effect that such shares
may be freely sold and thereafter publicly traded without registration under the
Act.

Company's Authenticating Initials:_____________________
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         5.  Transfer of Option  Shares.  Option  Shares issued upon exercise of
this Option which have not been  registered  under the Act shall be transferable
by a holder thereof only upon  compliance with the conditions in this Paragraph.
Before making any transfer of Option Shares, the holder of the shares shall give
written  notice to the Company of the holder's  intention to make the  transfer,
describing the manner and  circumstances  of the transfer.  If in the opinion of
the  Company's  counsel,  or of other  counsel  acceptable  to the Company,  the
proposed  transfer  may be  effected  without  registration  under the Act,  the
Company  shall so notify the holder and the holder shall be entitled to transfer
such shares as described in the holder's notice to the Company.  If such counsel
opines that the  transfer may not be made  without  registration  under the Act,
then the Company shall so notify the holder, in which event the holder shall not
be entitled to transfer  the shares  until (i) the Company  notifies  the holder
that it is permissible to proceed with the transfer, or (ii) registration of the
shares under the Act has become effective. The Company may issue "stop transfer"
instructions  to its  transfer  agent  with  respect to any or all of the Option
Shares as it deems necessary to prevent any violation of the Act.

         6. Transfer or Encumbrance of this Option  Prohibited.  This Option may
not be  transferred  or  assigned  in any manner by the  Optionee,  without  the
Company's prior consent. However, if Optionee is a natural person, the foregoing
sentence  notwithstanding,  this Option shall be  transferable  by will or trust
upon the  Optionee's  death or by operation of law under the laws of descent and
distribution,  or pursuant to any divorce or domestic  relations order. The same
restriction  on  transfer  or  assignment  shall  apply to any heirs,  devisees,
beneficiaries or other persons acquiring this Option or an interest herein under
such an  instrument  or by operation of law.  Further,  this Option shall not be
pledged, hypothecated or otherwise encumbered, by operation of law or otherwise,
nor shall it be subject to execution, attachment or similar process.

         7. No Rights as  Stockholder.  The  Optionee  shall have no rights as a
stockholder  with respect to Option Shares until the date of issuance of a stock
certificate for such shares. No adjustment for dividends, or otherwise, shall be
made if the  record  date  therefor  is prior to the  date of  exercise  of such
Option.

     8. Changes in the Company's Capital Structure. The existence of this Option
shall not limit or  affect in any way the right or power of the  Company  or its
shareholders  to make or authorize  any or all  adjustments,  recapitalizations,
reorganizations  or other  changes in the  Company's  capital  structure  or its
business,  or any merger or consolidation of the Company, or any issue of bonds,
debentures, preferred or prior preference stock ahead of or affecting the Option
Shares or the rights thereof,  or the dissolution or liquidation of the Company,
or any sale or  transfer  of all or any part of its assets or  business,  or any
other corporate act or proceeding,  whether of a similar character or otherwise.
However,

         (a) If,  prior  to the  Company's  delivery  of all the  Option  Shares
subject to this  Option,  the  Company  shall  effect a  subdivision  (split) or
combination  (reverse split) of shares or other capital  readjustment,  or other
increase or reduction of the number of shares of  outstanding  of the same class
as the Option Shares, without receiving compensation therefor in money, services
or  property,  then (i) in the event of an increase in the number of such shares
outstanding,  the Purchase Price shall be proportionately reduced and the number
of Option Shares then still purchasable shall be proportionately  increased; and
(ii) in the event of a reduction in the number of such shares  outstanding,  the
Purchase  Price  payable per share shall be  proportionately  increased  and the
number of Option Shares then still purchasable shall be proportionately reduced.

         (d) Except as hereinbefore expressly provided, the issue by the Company
of shares of stock of any class, or securities  convertible into shares of stock
of any class, for cash or property,  or for labor or services either upon direct
sale or upon the exercise of rights or warrants to subscribe  therefor,  or upon
conversion of shares or obligations of the Company  convertible into such shares
or other securities, shall not affect, and no adjustment by reason thereof shall
be made with respect to, the Purchase  Price or the number of Option Shares then
subject to this Option.



Company's Authenticating Initials:_____________________
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         9. Withholding  Taxes.  Pursuant to applicable  federal and state laws,
the Company may be required to collect  withholding  taxes upon any  exercise of
this  Option.  The Company may  require,  as a condition to any exercise of this
Option, that the Optionee concurrently pay to the Company the entire amount or a
portion of any taxes which the Company is required to withhold by reason of such
exercise,  in such  amount  as the  Board of  Directors  in its  discretion  may
determine.  In lieu of part or all of any such payment,  the Optionee may elect,
with the consent of the Board of  Directors,  to have the Company  withhold from
the Option  Shares to be issued  upon  exercise  of this  Option  that number of
shares  having a fair  market  value  equal to the amount  which the  Company is
required to withhold.

         10. Notices,  etc. Any notice  hereunder by the Optionee shall be given
to the  Company in  writing,  and such  notice and any  payment by the  Optionee
hereunder  shall be deemed duly given or made only upon  receipt  thereof at the
Company's office at 8037 South Datura Street,  Littleton,  Colorado 80120, or at
such other address as the Company may  designate by notice to the Optionee.  Any
notice or other  communication to the Optionee hereunder shall be in writing and
shall be deemed duly given or made if mailed or delivered to the Optionee at the
last address as the Optionee may have on file with the Company's Secretary. This
Option shall be governed under and construed in accordance  with the laws of the
State of Colorado. This address shall be binding on the Company and the Optionee
and all  successors,  assigns,  heirs,  devisees  and  personal  representatives
thereof.

     NOTE:  This  Common  Stock  purchase  option  must match the  control  copy
maintained by the Company in every particular.

         IN WITNESS  WHEREOF,  the Company has duly authorized and executed this
Stock Option as of the date first above written.

                                          ISO BLOCK PRODUCTS USA, INC.



                                          By: /s/ Egin Bresnig
                                          --------------------
                                          Egin Bresnig
ATTEST:


By: /s/ Dean Wicker
- -------------------
Dean Wicker, Secretary






(SEAL)




Company's Authenticating Initials:_____________________
                                                                     Page 3 of 4





                                  EXERCISE FORM

                                     Common
                                  STOCK OPTION

         I or we, the  undersigned  holder of this  Common  Stock  Option of Iso
Block Productions USA, Inc.  ("Company"),  hereby elect to exercise the right to
purchase  _______________________  shares of the  Common  Stock  subject  to the
foregoing  option at the price of US$0.80  per share.  Payment for the shares in
the amount of  US$______________  accompanies  this Exercise Form in the form of
money order,  bank or cashier's  check, or has been made by wire transfer to the
Company's accounts.

         Request is made that certificates evidencing the shares being purchased
hereby be issued in the name and sent to the address provided below, and, if the
number of shares  being  purchased  is less than all of the shares  which may be
purchased upon exercise of the foregoing option, that a new option of like tenor
for the  balance of the  shares  not being  purchased  upon  exercise  hereof be
delivered to the undersigned at the address below.


Name

Address

Postal Code


         I  acknowledge  and agree that the  certificate  evidencing  the shares
purchased  hereunder  will  bear  an  appropriate  investment  or  other  legend
restricting the transfer of such shares except upon registration of those shares
under the U.S.  Securities Act of 1933, as amended,  or pursuant to an available
exemption from such registration requirements.


DATED:___________________, 19_____



                                        X...,,,,,,..............................
                                        Signature of Option Holder


NOTE:    This option may only be exercised by the registered holder,  unless the
         Company has consented to  assignment  of this Option or the  exercising
         party  demonstrates  that he, she or it is the legal  successor  to the
         registered holder.


Company's Authenticating Initials:_____________________
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