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All Categories > Fire Protection Products > STI Spec Seal > SSC Firestopping Collars  
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SSC Firestopping Collars

The SpecSeal® Firestop Collar is a factory-manufactured device designed to protect plastic pipes penetrating fire-rated walls and floors. Utilizing a heavy gauge galvanized metal collar to house a molded intumescent insert, the SpecSeal® Collar is specifically sized to fit 1-1/2", 2", 3", 4", and 6" trade sized pipes.

This product utilizes STI’s patented two-stage intumescent technology, providing a very responsive and highly directionalized expansion. Expansion is extremely fast, providing quick closure for burning combustible pipes.

When exposed to temperatures in excess of 250°F (121° C), the SpecSeal® Collar’s molded insert begins to expand (intumesce) rapidly to form a dense, highly insulative char. Its free expansion ranges from 16-24 times original (pre-expanded) volume. Expansion continues up to 1,000° F.

Item #

Product Name


Unit Quantity


SSC400.EA SSC 4" Firestop Collar 4" Collar Per Collar NA
SSC600.EA SSC 6" Firestop Collar 6" Collar Per Collar NA


SSC Firestop Collars MSDS

SSC Firestop Collors Data Sheet