AVANT SB PRIMARY Primer; It is a single-component, solvent-containing bitumen-based, ready-to-use waterproofing primer material. AVANT SB PRIMARY is used as a primer before applying bitumen-containing insulation. Thanks to its superior adhesion feature, it forms a film layer on the surface after the solvent it contains evaporates. It ensures a stronger and gap-free adherence of the insulation material applied on the surface. It is suitable for use on reinforced concrete, wood and metal surfaces.