BOSS 814 Christy's Latex Firestop Sealant
This is a one part, Elastomeric, intumescent firestop sealant that expands when exposed to fire or extreme heat, forming an insulated char. Boss 814 will prevent the spread of toxic gases, smoke and fire. Suitable for adhesion to almost any surface, it remains flexible, making it ideal for both horizontal and vertical joints(subject to vibration). It is ASTM E-814(UL 1479).