This product is a non-toxic, non-irritant, flexible water based sealant to ensure a fire resistant seal on gaps around any wall boxes, cables, conduit, busways and ducts which penetrate walls, floors and ceilings. It can also be used to replace any intumescent material inadvertently removed during wall box installation.

Supplied in 300ml cartridges, The Promaseal Mastic gives up to 4 hours FRL when tested to AS1530 Part 4 2005. The Promaseal Mastic provides an excellent bond to metal, concrete, plasterboard and cable coverings, and remains soft and flexible after curing to accommodate thermal cycle movements.