PV4 is a prefabricated waterproofing membrane made of APP-modified bitumen, with a dual-reinforced design: a non-woven polyester reinforcement, which provides excellent mechanical strength and good dimensional stability, combined with a second glass fibre reinforcement, which enhances thermal stability and resistance to temperature variations. Both faces are coated with a heat-fusible HDPE film, allowing clean, reliable and fast torch-applied installation, with uniform adhesion and excellent compatibility with the other bituminous membranes of the system.
Versatile, PV4 can be used both as an underlayer and as a protected top layer in multilayer waterproofing systems, in new construction as well as in renovation. It is suited to accessible and non-accessible flat roofs, industrial and commercial buildings, technical terraces, covered car parks, as well as buried structures and wet areas. When used as a top layer, it must be protected from UV radiation by an aluminium paint or by heavy protection (gravel, paving slabs, asphalt).
For optimal adhesion, installation is carried out on a clean, dry and stable substrate, with a suitable bituminous primer. PV4 holds favourable technical approvals from CETEC and Excell Control, available on request.
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