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What Are Sheet Waterproofing Supplies?

Sheet waterproofing materials create protective barriers preventing liquid penetration into building foundations, roofs, walls, and structures.  As per experts like Industrial Supplies, sheet waterproofing supplies block water intrusion and moisture damage through robust physical coverage and sealing.

These continuous impermeable sheets come in various compositions for diverse waterproofing applications:

Bitumen Membranes

Bitumen sheet membranes utilize rubberized asphalt laminated between layers of reinforcement like polyester, fiberglass, or polyethylene. The pliable rolls apply adhesive side down onto surfaces.

Bitumen sheets waterproof substructures and roofs with strong, flexible protection. They self-seal small punctures and cracks.

EPDM Membranes

Ethylene propylene diene monomer rubber offers versatile synthetic single-ply sheeting resistant to UV, ozone, and extreme temperatures. Its elasticity accommodates expansion and contraction.

Use EPDM on flat or low-sloped roofs as seamless liner protection even around complex roof protrusions.

PVC Membranes

Polyvinyl chloride sheets provide durable waterproofing for oddly shaped roofs and details. The thermoplastic membrane fuses together into unified sections.

PVC’s lightweight flexibility facilitates attachment to curved or irregular substrates. Choose reinforced sheets for high durability.

Polyethylene Sheets

Cost-effective polyethylene plastic sheet liners work well for straightforward waterproofing applications. The thin, flexible material seals well around protrusions and angles.

Use polyethylene membranes to line small ponds and water features or damp-proof foundations. Limit to non-traffic areas.

Rubber Membranes

Rubber polymer sheets offer stretchy, seamless protection for complicated shapes and roof types. Choose chlorinated polyethylene or ethylene propylene diene monomer rubber.

Liquid rubber coatings brush-applied atop the sheet create fully bonded monolithic membranes once cured.

Metal Sheets

Stainless steel, copper, aluminum and galvanized steel function as waterproofing sheets. The rigid metal withstands foot traffic, resists corrosion, and provides robust protection.

Use metal waterproofing sheets for parking decks, plaza coverings, industrial roofs and other high-traffic areas.

Bentonite Mat Sheets

Bentonite clay encapsulated between geotextiles or plastic forms self-sealing waterproof sheets. The clay swells upon contact with moisture to block water passage.

Apply bentonite mats against foundation walls and substructures as a barrier able to mold around objects.

Liquid-Applied Membranes

Polyurethane, acrylic, and epoxy-based coatings apply as fluid sheets covering surfaces. The elastomeric liquid layers cure seamlessly with excellent adhesion.

Liquid membranes accommodate detailing work around drains, joints, and penetrations on most roofing and foundation materials.

Cementitious Sheets

Cement-based sheets offer rigid waterproofing capable of withstanding hydrostatic pressure when applied against retaining walls, foundations, and substructures.

Fiber-reinforced cement panels secure in an overlayment system or adhere with liquid membranes for added protection.

Composite Membranes

Combination materials like HDPE-laminated bitumen or rubber-asphalt offer hybrid performance. The composite enhances durability, elasticity, tear resistance and other qualities.

Composite membranes achieve specialized physical and chemical properties based on application requirements like high-traffic decking.

Prefabricated Sheets 

Some sheet membranes come as prefabricated modular panels for rapid installation. These interlocking sections assemble over surfaces like tile puzzles with built-in sealing for convenient waterproofing.

Below-Grade Applications 

Special sheet membranes resist hydrostatic pressure when applied to foundation walls and substructures. These heavy-duty sheets prevent underground water ingress that could destabilize buildings.


Sheet membranes install as continuous protective envelopes over large surface areas. Selecting appropriate sheet waterproofing materials and compatible accessories like fasteners, sealants and drains ensures durable liquid-tight barriers. Consult engineering experts on ideal product specifications. With the right sheets, buildings maintain dry, stable conditions for decades.

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