App Membrane Bitumax Waterproof.

APP (Atactic Polypropylene) membranes are waterproofing sheets made from bitumen modified with plastic polymers. They are commonly used for flat roofs, foundations, and terraces. APP membranes are durable, UV-resistant, and applied using a torch-on method, providing long-lasting protection against water infiltration. Dimensions 1m × 10 mtrs