A Small but Vital Part of an Effective Firestop SystemWith its small but critical design features, 3M Fire Barrier RC-1 Restricting Collar is integral to successful intumescent firestop installation around penetrations in wall, floor and floor/ceiling assemblies. Quite simply, its a crucial component for ensuring that elastomeric and hard char firestop material will properly close openings left by burned non-metallic pipes and other penetrations. In fact, the use of such a collar is required for firestopping plastic pipes larger than 4 (101.6 mm) in diameter. The Fire Barrier RC-1 is ideal for use in conjunction with 3M Fire Barrier Wrap Strip FS-195+ or 3M Fire Barrier Ultra GS firestops.Recommended ApplicationsUL-classified for use on PVC, CPVC, ABS, CCPVC, CCABS, PVDF, PP and PB plastic pipeIn conjunction with 3M Fire Barrier Wrap Strip FS-195+In conjunction with 3M Fire Barrier Ultra GSThe Basis for Durable FirestopsDurable 28-gauge steel is thin enough for installers to easily unroll and cut to size around the installed firestop. It is quickly secured into place with a hose clamp or steel tie wire. Notches in its outer edge of the RC-1 Restricting Collar form bendable tabs installers simply bend them into place and use hardware such as masonry fasteners (sold separately) to anchor them to the floor or ceiling slab. The result is a permanent, fixed firestop that also contributes to the structural stability of the penetration.The Science of Better Fire Protection from 3MSince 1925 when a lab assistant invented masking tape, 3M has been applying science to life developing adhesive products and technologies that help entire industries and individual businesses worldwide. The work that began with a single 3M engineer now spans decades and generations. And all of it goes into each adhesive, sealant, and protective coating, along with the best ways to use them including 3M Fire Barrier RC-1 Restricting Collar to improve performance, and to help businesses like yours operate faster, better and more efficiently.