Bitumen Primer is a low viscosity, high penetration, cold applied bituminous solution designed to prime and seal porous roof surfaces prior to the application of covering materials. Geochem General Purpose Bitumen Primer seals porous substrates and promotes the adhesion of bituminous waterproofing systems and sheet coverings. It can be applied to a wide range of surfaces including: concrete, asbestos cement, Metal (mild steel, zinc, lead), slate and lightweight concrete screeds.