POWER OF ATTORNEY

The undersigned hereby constitutes and appoints
G. Patrick Lynch and Matthew C. Wolsfeld,
and each of them signing singly, and with full
power of substituion, to be the undersigned's
true and lawful attorney-in-fact to:

(1) 	Prepare, execute in the undersigned's name
and on the undersigned's behalf, and to submit to
the U.S. Securities and Exchange Commission
(the "SEC") a Form ID, including amendments thereto,
and any other documents necessary or appropriate
to obtain codes and passwords enabling the
undersigned to make electronic filings with the
SEC of reports required by Section 16(a) of the
Securities Exchange Act of 1934, Rule 144 under the
Securities Act of 1933, or any rule or regulation
of the SEC; and

(2)     execute for and on behalf of the undersigned,
in the undersigned's capacity as an officer an
officer and/or director of Northern Technologies
International Corporation, any Form 144 in
accordance with Rule 144 under the Securities
Act of 1933, as amended, and any Form 3, Form 4 or
Form 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the
rules and regulations adopted thereunder; and

(3) 	Do and perform any and all acts for and on
behalf of the undersigned which may be necessary
or desirable to complete and execute any such
Form 144, Form 3, Form 4 or Form 5, complete and
execute any amendment or amendments thereto, and
timely file such form with the SEC and any stock
exchange or similar authority; and

(4) 	Take any other action of any type
whatsoever in connection with the foregoing which,
in the opinion of such attorney-in-fact, may be
of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood
that the documents executed by such attorney-in-fact
on behalf of the undersigned pursuant to this Power
of Attorney shall be in such form and shall contain
such terms and conditions as such attorney-in-fact
may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such
attorney-in-fact full power and authority to
do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the
exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as
the undersigned might or could do if personally
present, with full power of substitution or
revocation, hereby ratifying and confirming all
that such attorney-in-fact, or such attorney-in-
fact's substitute or substitutes, shall lawfully
do or cause to be done by virtue of this Power
of Attorney and the rights and powers herein
granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such
capacity at the request of the undersigned, are not
assuming, nor is Northern Technologies International
Corporation assuming, any of the undersigned's
responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934, as amended, or
Form 144 of the Securities Act of 1933, as amended.

This Power of Attorney shall remain in full
force and effect until the undersigned is no longer
required to file Form 144s, Form 3s, Form 4s or
Form 5s with respect to the undersigned's holdings
of and transactions in securities issued by Northern
Technologies International Corporation, unless earlier
revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this
2nd day of May 2008.

/s/ Keong Koh Soo
Signature
Keong Koh Soo
Print Name