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Fire Rated Intumescent firestop pipe collars are prefabricated for open and closed through-penetration firestop systems. Firestop collars consist of a steel collar and an intumescent silicone strip suitable for 1.5”, 2”, 3” and 4” nominal trade size plastic pipes and large electrical cables; carry up to a 4 Hour fire rating. Intumescent collars are to be fastened around plastic pipes where they penetrate fire rated floor and walls. Firestop collars are lightweight and durable, and are ready-to-use. Easy installation via a locking mechanism reduces labor time. Tested to ASTM-E814 performance specifications, UL Classified.