Intumescent seals: Signed, sealed and delivered

With fire doors under close scrutiny in the aftermath of Grenfell, the public’s trust in their ability to protect lives and assets urgently needs to be restored. Rebuilding confidence in fire rated doorsets needs a focus on every element of its construction, with one of the most critical elements being the intumescent seal. Intumescent seals have now been used in fire rated doorsets for four decades. They help to stop the spread of fire and smoke, with the most common types in the UK being manufactured from compounds of sodium silicate or intercalated graphite.