[LETTERHEAD OF STURSBERG & VEITH]


                                                              February 2, 2000


Tech Laboratories, Inc.
955 Belmont Avenue
North Haledon, NJ 07508

Gentlemen:

     We have acted as counsel to Tech  Laboratories,  Inc.  (the  "Company")  in
connection  with the  registration  by the Company under the  Securities  Act of
1933,  as amended (the "Act"),  of a minimum of 258,065 and a maximum of 451,613
shares of the Company's  authorized  but unissued  common stock,  $.01 par value
(the "Shares").

     On the basis of such  investigation as we have deemed necessary,  we are of
the opinion that:

     1. The  Company  has been  duly  organized  and is  validly  existing  as a
corporation in good standing under the laws of the State of New Jersey.

     2. The Shares have been duly authorized  and, when issued,  will be legally
issued, fully-paid and non-assessable.

     We hereby  consent  to the  filing of this  opinion  as an  exhibit  to the
Registration  Statement on Form SB-2, and to the related Prospectus with respect
to the above-described  offering. In giving this consent, we do not hereby admit
that we come under the  category  of persons  whose  consent is  required  under
Section 7 of the Act or the rules and regulations of the Securities and Exchange
Commission promulgated thereunder.


                                                           Very truly yours,


                                                           /s/ Stursberg & Veith
                                                               Stursberg & Veith