Soudal Australia - Ideal for sealing masonry and plasterboard joints, as well as for interior applications with limited joint movement capability, Firecryl FR is a fire-resistant, smoke-tight, acoustic, one-component plasto-elastic joint sealant
Soudal FIRE CRYL FR fire resistant hybrid polymer sealant Single 310ml Cartridge - Grey
How to seal openings and penetrations against fire - YouTube