Stopseal® LJS is an intumescent thermo-plastic filled with flame retardants and binders which provide a high-performance volume expansion and pressure seal situated in an elastomeric, acoustic rated foam which allows for high movement. Stopseal® LJS is designed to reinstate the fire resistance of wall and floor constructions in linear gap seals.

Stopseal® LJS is used to provide provides fire resistance for up to 120 minutes in linear gaps, ensuring that the integrity of the structure is maintained during a fire, and intumesce to maintain their properties under high temperatures to block fire and smoke.