3 in - 4 in STI SpecSeal RTC Intumescent Firestop Collars

SpecSeal Series RTC Range-Taking Firestop Collars are factory-manufactured devices designed to seal plastic pipes penetrating through fire resistance rated walls and floors. SpecSeal RTC Collars are comprised of a heavy gauge metal collar housing a molded intumescent insert. The adjustable collar is designed to allow a single collar to fit 3 and 4 trade size pipes (89 and 114 mm) and corresponding 3 and 4 couplings (102 and 127 mm). When exposed to temperatures in excess of 320 F (160 C), the SpecSeal RTC Collars molded insert begins to expand (intumesce) rapidly to form a dense, highly insulative char. Free expansion ranges from 32 to 64 times original (pre-expanded) volume. Expansion continues up to 1,000 F (538 C).

Features:
Adjustable: One collar fits 3 (89 mm) pipe, 3 (102 mm) coupling, 4 (114 mm) pipe, and 4 (127 mm) coupling
Rapid Expansion: Closes off burning pipes quickly
Small Profile: Use it in all the tight spots
Flexible & Durable: No loose flakes (eye hazards)
Water Resistant: No water soluble or hygroscopic ingredients
Economical: Lower installed cost
High Volume Char: Expands up to 60 times