SpecSeal® RTC Firestop Collars are versatile, adjustable intumescent firestop devices designed to accommodate multiple sizes of combustible plastic pipe. A single RTC Collar is engineered to fit both 3‑inch and 4‑inch plastic pipes, including their associated couplings, making it an ideal all‑in‑one solution for diverse jobsite conditions. Thanks to its adaptable design, the SpecSeal RTC Firestop Collar allows installers to quickly bring nonmetallic pipe penetrations up to code, reducing the need for multiple collar sizes and simplifying inventory management. This flexibility makes RTC Firestop Collars a highly effective and time‑friendly option for achieving reliable fire resistance in commercial and residential construction.

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
• High volume char - expands up to 60 times