DATE:          August 27, 1993

TO:                   J. Duncan Urquhart

FROM:                 Sono-Tek Corporation
                      2012 Route 9W, Bldg. 3
                      Milton, NY  12547

SUBJECT:              Letter of Agreement

Dear Duncan,

        As you are aware, Sono-Tek Corporation ("Sono-Tek" or the "Company") has
sustained  extensive losses from operations for the last several years. In order
to assure the  survival of the  Company,  it is  necessary  to  restructure  the
Company and raise  additional  working  capital.  This has forced the Company to
implement drastic and far reaching  initiatives and restructuring.  Sono-Tek has
sought and received significant  reductions in the amounts owed to suppliers and
creditors,  as  well  as  extended  payment  terms.  This  letter  of  agreement
represents  the full  understanding  between  you and Sono- Tek as of August 27,
1993.

1.      Sono-Tek will continue your employment as Controller, reporting to the 
        CEO of the Company.

2.      Your compensation will consist of a base salary and a bonus plan based 
        on the overall financial performance of the Company.  The base salary 
        will be at an annual rate of $52,700 and will be paid at times 
        consistent with the standard payroll practice of the Company. In
        addition to the base salary, you will be eligible to receive a maximum 
        annual bonus of $7,000.  This bonus will consist of $1,250, paid
        quarterly, for each quarter in which the Company earns a profit after 
        giving effect to all management bonuses, and a one-time payment at the 
        end of the year of $2,000 if the Company is profitable after giving 
        effect to all management bonuses. In future years, it is anticipated 
        that this bonus plan will be based on individual performance to the 
        Annual Operating Plan of the Company in addition to overall corporate 
        performance.

        The initial payment of $2,500 for the first and second quarters will be
        made to you on September 24, 1993.

3.      You currently have no options to purchase shares of common stock of .


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        Sono-Tek The Company has been advised by legal  counsel  that the 1983  
        Incentive Stock  Option  plan  for key  employees  is  flawed.  In  
        addition, the 1,000,000  shares  reserved for  issuance  under the Plan 
        is out of line with generally accepted levels.

        As a result,  Management will,  working with legal counsel,  establish a
        1993  Incentive  Stock  Option  Plan and use its best  efforts to obtain
        shareholder   approval  for  that  Plan  at  the   shareholder   meeting
        tentatively  scheduled for October,  1993. You will be issued 25,000 new
        options at an exercise price of approximately $1.00 per share.

4.      The Company has  reserved a total of $1,016 in accrued  salary,  and you
        hereby agree to forgive this entire  amount and further  agree that this
        represents full and total past-due salary payable to you.

7.      The level of your base salary and bonuses will be reviewed annually at 
        the time of the Annual Meeting of Shareholders of the Company.


SONO-TEK CORPORATION                                 ACCEPTED AND AGREED TO:


BY:   /s/ Samuel Schwartz                           /s/ J.Duncan Urquhart
   -----------------------                         ----------------------
      SAMUEL SCHWARTZ                                 J. DUNCAN URQUHART
        CHAIRMAN

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