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 |




