Duram S900

Description

Duram S900 is a clear, penetrating siloxane treatment designed to protect porous masonry and concrete surfaces against water ingress and weathering. It penetrates below the surface to create a water-resistant barrier while allowing the substrate to breathe, helping maintain the natural appearance of the material without leaving a glossy finish. Suitable for a range of exterior masonry applications, S900 also helps minimise efflorescence and reduce moisture-related deterioration.

Key Features;
Deep penetrating protection: Creates a water-resistant barrier within porous substrates.
Breathable finish: Allows water vapour to escape while reducing liquid water penetration.
Natural appearance: Dries clear with a non-glossy finish.
Weather resistant: Provides protection against rain and salt spray.
Helps reduce efflorescence: Minimises moisture-related salt deposits.
High-pH resistance: Suitable for alkaline substrates, including new concrete and lime-based masonry.
Long-lasting protection: Helps reduce moisture-related deterioration when correctly applied.

Suitable For;
Concrete and cement render.
Face brick and blockwork.
Sandstone and other porous masonry.
Porous and terracotta pavers.
External walls and other porous surfaces exposed to weather.

Product Specifications;
Product type: Clear penetrating siloxane water repellent
Finish: Clear, non-glossy
Product size: 15LT
Application: Brush, roller, spray or pour
Coverage: Approximately 2–6m²/L, depending on substrate porosity and application; terracotta pavers approximately 3m²/L per coat
Touch dry: 2–4 hours
Full cure: 12–24 hours at 25°C and 50% relative humidity

🔮 WWIS Pro Tip.
For the best results, apply Duram S900 to a clean, dry and sound substrate. Saturate the surface thoroughly, applying additional coats wet-on-wet while the previous coat is still being absorbed. Highly porous or friable surfaces should be test-patched first to confirm adequate absorption. Remember, S900 is a penetrating water repellent, not a crack-bridging membrane, so repair cracks before application.