ROLLSTICK 31 ALPA is a glass-fibre reinforced bituminous air and vapour control layer (AVCL) with ALPA binder. It has semi-continuous strips of self-adhesive bitumen on the surface, protected by thermofusible film, and a thermofusible film on the undersurface.
An AVCL low permeability membrane used as part of a system to control the movement of air, water vapour and heat leakage from within the building. Can also be used as a base or underlayer in a multi-layer waterproofing system, and as an adhesive layer + AVCL for insulation.