The Allproof Drop-In Fire Collar has been designed and tested on a wide range of service penetrations. This is a simple and effective passive fire rating option for thin concrete floors or composite steel tray concrete floors. These floors feature profile changes on the underside of the slab and make it difficult to fire rate with a conventional fire collar fixed to the underside of a slab. The Drop-In Fire collar allows the penetration to transition through at any location on the composite floor profile. Drop in fire collars are all installed from the top of the floor slab.

Drop-In Fire Collars consist of an intumescent strip encased in a galvanised steel casing with extendable fixing tabs. The extendable tabs allow for fixing the collar at the required height on different composite profiles and thicknesses.

In the event of a fire, the intumescent material expands against the steel casing as the penetration service melts or deforms. The fire collars steel casing enables fast activation of the intumescent, forming a stable fire-resistant seal, maintaining both fire integrity and insulation.

The Allproof Drop-In fire collars have been tested at accredited fire laboratories in accordance AS1530.4 and AS4072.1. Tested and designed for both stack and floor waste penetrations.