Dowsil Firestop 400

DOWSILâ Firestop 400 is an intumescent acrylic sealant for internal applications, developed to maintain the integrity of firewalls or partitions. Developed to maintain the integrity of fire walls or partitions Tested to B.S.476 Part 22: 1987 Up to 4 hour fire rating can be achieved Class 2 classification for surface spread of flame Extreme Temperature Resistant, Mildew Resistant, Mould Growth Resistant, Ozone Resistant, UV Radiation Resistant Tack free time-30 to 45 minutes Good unprimed adhesion to most construction substrates Uses involve internal perimeter pointing around door and window frames and in joints formed where fire rated partition sections meet