Everbuild Everflex Pyro Mate Firesil Fire Protection Silicone Sealant is a neutral cure, elastic silicone sealant which conforms to the EN1366-4 standard for fire retardancy and has a fire rating of up to 5 hours in certain joint configurations. Suitable for use on all building joints which require a fire rating including joints up to 50mm wide and 25mm deep. Everflex Pyro Mate neutral cure properties adheres to most building surfaces both porous and non porous without the need for priming on most surfaces and provides a 20 - 30 minute tooling time if required. Everflex Pyro Mate can also be used to seal voids, irregular holes in fire walls and fire rated expansion joints with excellent weathering characteristics making it suitable for both internal and external use. Everflex Pyro Mate Sealant remains permanently flexible to enable it to handle temperature expansion and contraction of joints. CE Marked under both ETAG 026 Part 3 and EN15651-1:2012 type F-EXT-INT CC class F 25LM.