APP Primer (Atactic Polypropylene Primer) is a bitumen-based primer used to prepare surfaces before the application of APP membranes or other bituminous waterproofing systems. It enhances adhesion between the substrate and the membrane.
Key Features:
Made from bitumen and fast-drying solvents
Improves bonding of torch-on APP membranes
Penetrates and seals porous surfaces
Applied by brush, roller, or spray