Prosoco SL100 Water Repellent

SL100 Water Repellent protects horizontal and vertical concrete and masonry surfaces against water and waterborne contaminants. Offering invisible protection and low volatility, SL100 ensures maximum penetration and colorless protection of dense, color-sensitive surfaces. It’s ideal for GFRC, integrally colored precast concrete, and many types of natural stone.

Product Description

SL100 Water Repellent is a 100% active, clear silane water repellent for horizontal and vertical concrete and masonry surfaces. It provides long-lasting protection without altering the appearance or breathability of the surface. SL100 chemically bonds with the substrate, offering deep penetration and effective protection from water and waterborne contaminants.

Key Benefits

  • 100% Active: High-performance formula for durable water repellency.
  • Invisible Protection: Does not form a film or gloss, preserving natural appearance.
  • Breathable Barrier: Treated surfaces “breathe” and allow moisture vapor to escape.
  • Versatile Use: Effective on vertical and horizontal concrete and masonry.
  • Resists Chloride Intrusion: Reduces corrosion from water-carried salts.

Best For

  • Polished and honed concrete
  • Cured concrete
  • Vertical and horizontal masonry
  • Vehicle-exposed surfaces
  • Architectural finishes

Product Properties

Property Specification
Form Clear, slightly yellow liquid; slight alcohol odor
VOC Content 350 g/L maximum Reactive penetrating sealer
Active Content 100%
pH Non-applicable
Coverage Rate 150 – 1500 sq ft/gal. See Product Data Sheet for variations per substrate.
Flash Point >113°F (>45°C) ASTM D3278
Wt/Gal 7.65 lbs to 7.70 lbs
Available Sizes 1-gal, 5-gal, 55-gal
Water Vapor Transmission 92% retention ASTM D6490
Shelf Life 1 year in tightly sealed, unopened container