About

 91 000 74051 Waterproofing chemicals are specialized compounds used to prevent water penetration, moisture damage, and seepage in structures. They form protective barriers on surfaces like roofs, terraces, bathrooms, basements, water tanks, foundations, and walls.

• Cement-based mix with special additives.

• Applied as a slurry or coating on concrete and masonry.

• Best for: Basements, bathrooms, water tanks, utility areas.

• Pros: Easy to apply, cost-effective, bonds well with concrete.

• Cons: Not very flexible can crack if the surface moves.

• Applied like paint cures to form a seamless, flexible film.

• Includes polyurethane or acrylic based liquids.

• Best for: Terraces, roofs, balconies, wet areas.

• Pros: Seamless protection, flexible with surface movement.

• Cons: Needs proper surface prep & curing conditions.

• Thick, sticky coatings made from bitumen.

• Best for: Foundations, basement walls, roofs.

• Pros: Strong water blocking and adhesion.

• Cons: May need protection from UV light on exposed areas.

• A high-performance liquid that cures into an elastic membrane.

• Best for: Roofs, terraces, exposed areas.

• Pros: Very flexible, durable, UV-resistant and long-lasting.

• Cons: Often more expensive than basic coatings.

• Water-based elastomeric coating.

• Best for: Roofs, terraces, exterior walls.

• Pros: UV resistant, easy to apply, crack-bridging abilities.

• Chemicals penetrate concrete and form crystals inside pores.

• Best for: Water tanks, basements, concrete slabs.

• Pros: Long-lasting internal protection.

• Cons: Works best during construction or early stages.

• Used to seal small gaps, joints, or cracks (e.g., around windows, tile joints).

• Pros: Easy to apply for specific problem areas.

• Cons: Not a full surface waterproofing solution by itself.

 Roof / Terrace waterproofing  liquid membranes, acrylics, polyurethanes.
 Bathrooms & wet areas  cementitious waterproofing, liquid membranes.
 Basements & foundations  bituminous coatings, crystalline systems.
 Water tanks / swimming pools  cementitious or crystalline waterproofing.
 Joints & gaps  silicone or polyurethane sealants.

To pick the best waterproofing chemical:

• Surface type: concrete, masonry, tiles, etc.

• Exposure: interior vs exterior and weather conditions.

• Movement tolerance: flexible membranes for areas that shift.

• Longevity & application: some need skilled application.