BOSS 810 Non-Intumescent Latex Firestop Sealant is a single part, acrylic, multi-purpose non-intumescent firestop sealant that will prevent the spread of toxic gases, smoke and fire. BOSS 810 is extremely flexible and is ideal for both horizontal and vertical joints subject to vibration or dynamic movement. BOSS 810 adheres to almost any surface. It can be used for interior or exterior applications, and can be painted (after inspection). BOSS 810 has been tested to ASTM E-814 (UL 1479) and meets the criteria for fire/smoke/draft stop for BOCA - CABO - UBC - SBCCI - IRC - IBC.