The environmentally friendly cavity closer incorporating a cavity fire barrier for unequalled fire protection

The FlameBlok cavity closer is the first fully tested fire-rated cavity closer available for cavities greater than 100mm, and the only fire-rated closer manufactured entirely from post-consumer recycled PVC-U. Wall cavities are a hidden danger area for fires, so cavity fire barriers that help to prevent fires spreading are a critical consideration.

Independently tested fire protection for up to 90 minutes
FlameBlok cavity closers create a continuous ring of fire protection around openings in cavity walls, combing cavity closer and cavity fire barrier in one product. They feature foil-encased fire insulation that reflects flames and heat and prevents moisture penetration.

FlameBlok cavity closers have been independently and rigorously tested to BSE EN 1363-1:1999 by Chiltern International Fire, achieving 90-minute integrity in masonry walls and 60-minute integrity in timber-framed walls.