H.E.R.C. Products Inc. Reports Financial Results for the Fiscal Year Ended Dec. 31, 2002.

Business Editors

PORTSMOUTH, Va.--(BUSINESS WIRE)--April 2, 2003

H.E.R.C. Products Inc. (OTC BB: HERC)(Boston Stock Exchange: HER) today released operating results for the fiscal year ended Dec. 31, 2002.

Sales for the fiscal year ended Dec. 31, 2002 were $6,491,113 compared with $5,966,564 during fiscal 2001 -- an 8.8% overall increase. Gross profit increased 8.0% to $2,761,077 during fiscal 2002 from $2,555,694 during fiscal 2001. Selling, general and administrative expenses increased 16.9% to $3,107,303 in fiscal 2002 from $2,657,141 in fiscal 2001. Other income and expense in 2002 reflects income of $142,446 compared to net expense of $62,160 in 2001. Net loss for fiscal 2002 was $203,780 compared to a net loss for fiscal 2001 of $163,607.

S. Steven Carl, chairman and chief executive officer of H.E.R.C., commented, "Our results for 2002 were negatively influenced by several one-time events, such as the corporate headquarters move to Virginia, that resulted in over $335,000 of net expense being added during the fiscal year. This increased expense was partially offset by the sale of our Chlor*Rid product for $225,000. On an on-going basis, excluding the net effect of all one-time items, our results for 2002 actually improved from 2001."

H.E.R.C. Products Inc. provides pipe cleaning, tank cleaning and other corrosion control services for multiple applications utilizing its proprietary and patented chemistry and processes. H.E.R.C.'s patented and proprietary chemistry and processes are currently used in cleaning marine, fire protection, potable water, chemical feed line, wastewater and other industrial systems. H.E.R.C.'s chemistry is certified biodegradable by Scientific Certification Systems and certified by NSF International to meet the requirements of ANSI/NSF Standard 60 for use in potable water systems.

Statements in this press release that are not historical facts are hereby identified as "forward-looking statements" as that term is used under the securities laws. We caution readers that such "forward-looking statements," are necessarily estimates reflecting the best judgment of our senior management and involve a number of risks and uncertainties that could cause actual results to differ materially from those suggested by the forward-looking statements. Readers should not place undue reliance on any such forward-looking statements, each of which speaks only as of the date made. Readers should refer to the related risks and uncertainties, which are disclosed in the company's reports filed with the SEC, including the company's Form 10-KSB for the year ended Dec. 31, 2002.

For more information, please visit our Web site at: www.hercprod.com.