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Large, irregular or hard to reach gaps or cavities can cause a range of problems around a dwelling. 

Bostik polyurethane foam fillers are the perfect solution to quickly and easily reduce noise, dust and draughts as well as block access to cavities by rodents and other pests that can quickly invade an open space. If fire rated protection is required; Bostik have a range of fire rated polyurethane foam fillers.

Fillers are great insulators against the weather and protect dwellings from the heat and cold while bonding to a variety of building materials to ensure large gaps are filled in the most difficult to reach locations. Once cured, it can be sanded to a smooth finish and painted over for a discrete appearance.


Cavities or gaps in building materials and structures pose a significant fire, smoke and gas risk that can take hold of a dwelling in mere seconds. Having the right level of protection not only reduces the rate at which fire can take hold but also gives the occupants a greater chance to escape to safety.

Bostik fire rated polyurethane foams have been formulated to be fire retardant and seal connections between walls, floors, ceilings, partition walls, windows and door frames against smoke and gas. This ensures that all Bostik fire rated polyurethane foam fillers meet AS1530.4-2014 (Fire resistance of elements of construction). If your structure does not require a fire rated seal; you can discover more from the Bostik range of polyurethane foam fillers.

Bostik fire rated polyurethane foam fillers have the benefits of regular polyurethane foam fillers with the addition of fire rated protection for up to 4 hours as well as acting as a smoke and gas retardant sealer. Once cured, it can be sanded smooth and painted over to provide the dwelling with discreet fire protection all year round.