Prosoco Concrete Silane WB 40

This ready-to-use, high-grade silane water repellent provides resistance against the damaging effects of water intrusion, freeze-thaw cycles, and chloride intrusion. Unlike conventional coatings and sealers, Concrete Silane WB 40 penetrates completely and reacts to form a chemical bond within the substrate. Treated surfaces retain their natural color, texture, appearance, and vapor permeability.

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Product Type

Water-Based Silane Emulsion Concrete Sealer

Product Description

Concrete Silane WB 40 is a water-based, 40% silane emulsion penetrating water repellent for concrete. Designed to provide high-performance protection from chloride intrusion, freeze/thaw cycles, and alkali attack.

Key Benefits

  • 40% Active Silane: Delivers deep penetration and superior protection.
  • Non-Film Forming: Breathable formula allows moisture vapor to escape—won’t change surface appearance.
  • VOC Compliant: Fully compliant with U.S. VOC regulations.
  • Long-Term Durability: Resists chloride intrusion and damage from freeze/thaw cycling.
  • Efflorescence & ASR Resistance: Reduces staining and structural degradation from moisture and alkalis.

Best For

  • Cast-in-place concrete
  • Precast concrete
  • Architectural concrete panels
  • Post-tensioned concrete
  • Parking decks and bridges
  • Sidewalks, curbs, and highway barriers

Product Properties

Property Specification
Form Milky white emulsion
Specific Gravity 0.95 – 0.99
pH 9.0 – 10.0
Wt/Gal 7.9 – 8.20 lbs
Active Content 40%
VOC Content 350 g/L maximum
Flash Point >158°F (>70°C)
Freeze Point 32°F (0°C)
Water Vapor Transmission 100% retention ASTM D6490
Shelf Life 1 year (tightly sealed, unopened container)
Coverage Rate Concrete: 100–200 sq.ft. (9–19 sq.m.)
Available Sizes 5 gallon, 55 gallon