How to install fire doors using FAS Fire Door Foam™ 60 minutes fire-rated expanding foam that saves on average 12 minutes per doorset without the need for mineral fibre wool or mastic. Specially tested to work with timber fire doors and timber or plastic packers. Fire, smoke and acoustic tested to BS476: Pts 20&22; BSEN 1634-1, Certifire CF5839. www.fireandacousticseals.co.uk