Chem Trete BSM 400 Pure Silane Water Repellent
Protectosil® Chem-trete® BSM 400 delivers next-generation silane technology for superior water repellency on brick masonry, concrete, and most natural stones. Designed for extreme performance, this pure silane formulation offers unmatched durability, excellent penetration, and the lowest levels of volatile organic compounds in its class. By penetrating deeply into the substrate and bonding chemically to the silica within, Chem Trete BSM 400 forms a permanent, invisible protective barrier against water and contaminant ingress while allowing full vapor transmission. This makes it ideal for exterior vertical masonry where appearance retention, longevity, and high-performance protection are essential.
Benefits of Chem Trete BSM 400
- Exceptional resistance to water intrusion
- High resistance to wind-driven rain
- Breathable protection that allows moisture vapor to escape
- Deep penetration into porous surfaces
- Reduced efflorescence and surface staining
- No change in surface appearance
- Excellent resistance to UV degradation
- No masking of windows required during application
- No blushing, peeling, or yellowing over time
- High resistance to alkali attack
Common Applications
Chem Trete BSM 400 is designed for use on above-grade vertical masonry and stone where maximum water repellency is required without altering aesthetics. Typical applications include protecting brick masonry from wind-driven rain, shielding vertical concrete structures from chloride ingress, and preventing corrosion of embedded reinforcing steel. It is also suitable for reducing mildew, efflorescence, and staining on vertical masonry and concrete facades in commercial, institutional, and historic restoration projects.
Packaging & Shelf Life
Available in 5-gallon pails, Chem Trete BSM 400 should be stored in a cool, dry place away from direct sunlight. Shelf life is 12 months in unopened containers. Protect from freezing and extreme heat during storage and transport.
Product Properties
| Property | Value |
|---|---|
| Technology | Pure silane water repellent |
| VOC Content | Low |
| Appearance | Clear, colorless liquid |
| Application Method | Low-pressure sprayer, roller, or brush |
| Packaging | 5-gallon pails |
Looking for a water-based alternative? Check out AQUA TRETE CONCENTRATE.
For full technical details, visit Protectosil by Evonik.
