Perforated membrane

GECO AIR perforated membrane is made of distilled bitumen, modified with elastoplastomeric polymers and reinforced with a perforated fiberglass mat. Both surfaces of the membrane are protected with an anti-adherent polyethylene burn off film. The diameter of the holes are of 40 mm and evenly across the surface. The particular formulation of GECO AIR membrane allows the product to be used with both SBS and APP modified membranes manufactured by GECO. GECO AIR is used for partial bonding waterproofing systems and applications, providing a constant and homogeneous bonding to the substrate. The application of GECO AIR allows the vapour diffusion below the waterproofing element, which is normally expelled throughout suitable air vents.