NOTICE OF GUARANTEED DELIVERY
TENDER OF PUBLIC WARRANTS
INTEGRATED SECURITY SYSTEMS, INC.
This form or one substantially equivalent to that set forth below must be used to accept the Offer (as defined
below) if certificates for Redeemable Common Stock Purchase Warrants (the "Public Warrants"), of Integrated
Security Systems, Inc., a Delaware corporation, are not immediately available, or the procedure for book-entry
transfer cannot be completed on a timely basis, or a warrant holder cannot deliver the certificate(s) and all other
required documents to the Transfer Agent prior to the Expiration Date (as defined in the Offering Circular
referred to below). Such form must be delivered by hand or sent by facsimile transmission or mail to the Transfer
Agent, and must be received by the Exchange Agent on or prior to the Expiration Date. See "The Offer--How to
Tender" in the Offering Circular.
The Transfer Agent:
AMERICAN STOCK TRANSFER & TRUST COMPANY
DELIVERY OF THIS INSTRUMENT TO AN ADDRESS, OR TRANSMISSION OF
INSTRUCTIONS VIA FACSIMILE NUMBER, OTHER THAN AS SET FORTH
ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.
Ladies and Gentlemen:
The undersigned hereby tenders to Integrated Security Systems, Inc., a Delaware corporation, upon the terms
and subject to the conditions set forth in the Offering Circular dated February 26, 1998 (the "Offering Circular")
and in the related Letter of Transmittal (which together constitute the "Offer"), receipt of which is hereby
acknowledged, the number of Public Warrants shown below, pursuant to the guaranteed delivery procedures set
forth in the Offering Circular under the caption "The Offer--How to Tender."
By Hand Delivery: Facsimile Transmission: By Mail:
(718) 921-8323 40 Wall Street
6201 15th Avenue New York, New York