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Composite Sheets
SpecSeal® Composite Sheet is the ideal solution for large openings where a permanent seal is required. Composite sheet consists of a thin sheet steel with intumescent embedded onto a single side. Composite sheet partners with other SpecSeal® firestop products such as Firestop Collars and EZ-Path® Devices to size down oversized openings.

Please call our experienced sales staff with any questions, we have people at each branch location who are STI FIT Level II certified.  You can also call STI Engineering services at 1-800-992-1180 EXT 2 for free engineering support and technical questions on firestop. 

You can find UL system ratings on STI’s website at the below link. 

Request a quote today, or contact Denali Industrial Supply to learn more.
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