Acoustic Sealant


Acoustic sealant or mastic developed for sealing joints, voids, and irregular holes in fire walls, stud walls, floors, partitions and other structures and for maintaining their integrity when sealing around pipes and cable penetrations. Also ideally suited for perimeter sealing of fire rated door and window frames.

536 in stock

ProductQuantityItem Price
Volume Discount25 +  3.93

Acoustic Sealant is a one-part flexible acrylic water based acoustic mastic. It has been specifically formulated to form an acoustic and fire rated intumescent barrier by sealing gaps between plasterboard walls, floors and ceilings, dry linings, and lined insulation boards. Our acoustic sealant adheres to all construction substrates and can be painted within one hour, dependent on temperature and humidity. It is emulsion acrylic based and gives a firm yet flexible seal to joints in a variety of fire rated structures. It will not support combustion and when subjected to heat, chars and intumesces preventing the spread of smoke and fire through the joint. Use it for internal perimeter pointing of fire rated door and window frames.

– Acoustic Rating: Rw(C;CTtr) 40dB(-3;-8)
– 4 hour fire rated intumescent sealant (Horizontal and Vertical)
– Stops noise leakage through gaps in floors and walls
– Perfect for internal perimeter pointing of fire rated door and window frames
– Certifire certification
– Prevents spread of smoke and fire
– For gaps up to 25mm wide
– Joint movement capability of 12.5%
– 310ml
– Enhances soundproofing
– Halogen free

Tested in accordance with
– BS EN ISO 140-3:1995 – acoustic rating
– BS476 – Part 20:1987 – fire rating
– BS EN 1366-3 – fire rating

Additional Information
Weight0.650000 kg




Fire Rating

4 hour fire rated