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Duram S900 Penetrating Siloxane Waterproofing Sealant

High-Performance Penetrating Siloxane Waterproofer

Duram S900 is a professional-grade, high pH, deep-penetrating siloxane waterproofing solution. It is designed to penetrate the tissue of porous substrates, creating a robust waterproofing barrier below the surface that prevents water ingress without altering the material's natural appearance or 'breathability.'

Ideal for stopping leaks without lifting tiles, Duram S900 also mitigates common structural issues such as corrosion of steel reinforcement, surface friability, and fungal/bacterial growth. Its advanced formula is capable of withstanding the high pH conditions typically found in new concrete and lime-based mortars.

Key Uses and Applications

  • Waterproofing external concrete, cement render, face brick, and block walls.
  • Protection of sandstone, porous pavers, and terracotta.
  • Prevention of efflorescence (white salt spotting) and leaching.
  • Sacrificial anti-graffiti protection and general rain barrier.
  • Assists in inhibiting mould and fungus growth.

Compatible Surfaces

Duram S900 is suitable for a wide range of porous substrates, including concrete, grout (tiled areas), block work, sandstone, and sand/cement tile beds.

CAUTION: Please note that sealed surfaces may be slippery when wet.

Technical Downloads:

Source: Duram S900 Official Technical Documentation