3M RC-1 Fire Barrier Restricting Collar 25 ft

25 ft Fire Barrier Collar

The 3M RC-1 restricting collar provides a 25-foot continuous length for sealing pipe penetrations through fire-rated walls and floors. It is intended for facility maintenance teams and contractors who need a flexible steel barrier that integrates with 3M wrap strip systems. The collar carries a two-hour fire rating and meets NSF H2 standards for use in regulated environments. Its silver steel construction uses 26 gauge material for durability.

Installation with Wrap Strips

The collar is designed for use with 3M Wrap Strip FS-195+ or Ultra GS, which must be purchased separately to complete the firestop assembly. Mounting hardware is not included, so installers need to supply appropriate fasteners for the specific substrate. The 6.5-inch height and 2-inch width profile fits around standard pipe diameters, but the flexible steel requires careful handling to avoid kinks during placement. Proper compression of the wrap strip is critical for the rated performance.

Capacity and Limitations

The 25-foot roll handles multiple penetrations on a single project, reducing waste from pre-cut lengths. It covers pipe sizes not otherwise specified by rigid collar dimensions, offering adaptability where standard collars cannot fit. The system relies entirely on the companion wrap strip for intumescent expansion; the steel collar alone provides no fire protection. Runs out when the wrap strip supply is exhausted or when pipe configurations exceed the collar's flexibility.