38-40mm 4hour Intumescent Pipe Collars (1/pack)

Firestop Collars consist of a powder coated steel sleeve containing a flexible graphite based intumescent liner manufactured to suit pipework to be firestopped for 1 or 3 or 4hour fire rating. Gaps up to 10mm around the pipe should be filled with Intumescent Acoustic Mastic or Intumescent Graphite Mastic. Gaps > 10mm require Firestop Compound. Toggle(s) hold the collar (which is a sliding fit) closed. Fire resistent fixings are requires the secure the collar against the wall.