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The APP membrane, short for Atactic Polypropylene Membrane, is a special waterproofing material that is manufactured from Bitumen. They comes in rolls. ... With proper workmanship, the APP membrane is a very efficient and durable waterproofing material used in most constructions.
Used in waterproofing and dump proofing of exterior walls of basements, retaining walls and flat roof waterproofing.
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