PROMASEAL® FC Retrofit Collar (Square-based type) is a multipurpose collar designed for use with concrete slabs, masonry, lightweight walls, and lined ceilings. The split-type collar design allows retrofitting where required, and it is available in a range of sizes to suit plastic pipes up to 315 mm outside diameter. The collars have been tested to provide up to 240 minutes of fire resistance.

Visit link to find out more: https://www.promat.com/en-sg/construction/products-systems/products/fire-stopping/collarwrap/promaseal-fc-retrofit-fire-collar/