Astroflame Low Smoke Mastic.
An intumescent mastic that has a low smoke and toxicity rating when activated by fire.
This sealant was designed to stop the smoke and flames from a fire spreading without adding significantly to smoke or toxicity itself.
Tested for passenger carrying train systems to BS6853:1999 (the code of practise for fire precautions in the design and construction of passenger carrying trains).
Tested EN1366-4 :
Tested BS 6853:1999 D8.3: Smoke Ao (max)
Tested BS 6853:1999 B.1: Toxicity R value
High performance 5 hour fire rating
Halogen free for low toxicity.
Joint movement capability of +/- 10%
Good unprimed adhesion to a wide variety of common building substrates.
Maintains the sound reduction index of a structure.
Read full specification here.