Protectosil AQUA-TRETE EM
Protectosil AQUA-TRETE EM is a penetrating, waterborne, vapor-permeable silane/siloxane emulsion designed to protect concrete, brick, concrete masonry units, and natural stone. As a ready-to-use, low-VOC solution, it chemically bonds to siliceous materials in the substrate, forming a permanent water-repellent barrier. This prevents the ingress of water and contaminants, reducing deterioration from efflorescence, scaling, corrosion of reinforcing steel, mildew, and other damage caused by moisture and environmental exposure. Unlike solvent-based alternatives, Protectosil AQUA-TRETE EM maintains full moisture vapor transmission, preventing issues like sealer blushing or freeze–thaw damage, making it ideal for sensitive projects and VOC-restricted regions.
Key Benefits of Protectosil AQUA-TRETE EM
- Non-flammable, low-VOC formulation compliant in all 50 U.S. states
- High resistance to wind-driven rain and waterborne contaminants
- Reduces efflorescence and leaching for cleaner surfaces
- Breathable system allows moisture vapor transmission
- Good penetration into various masonry and concrete substrates
- High resistance to alkali attack
- Long service life with minimal maintenance
- Ready-to-use — no blending or additives required
Common Applications
Protectosil AQUA-TRETE EM is recommended for:
- Concrete exposed to deicing salts and waterborne chemicals
- Brick, stucco, and sandstone façades
- Hand-molded bricks and natural stone surfaces
- Brick masonry, including single-wythe wall construction
- Concrete masonry units (split-face, fluted, ground-faced blocks)
- Projects in VOC-regulated areas such as California’s SCAQMD region
Packaging
Available in 5-gallon pails and 55-gallon drums. Shipped F.O.B. throughout the United States and Canada. For best results, store sealed and away from direct sunlight and moisture.
Product Properties
| Property | Value |
|---|---|
| Form | Waterborne silane/siloxane emulsion |
| Function | Concrete and masonry water repellent |
| VOC Content | Low-VOC, compliant in all 50 U.S. states |
| Performance | Vapor-permeable, high resistance to water intrusion |
| Special Features | Non-flammable, ready-to-use |
| Packaging | 5-gallon pails, 55-gallon drums |
For additional masonry protection products, see our Protectosil CHEM TRETE PB VOC. Learn more about Evonik’s full Protectosil line at www.silanes.evonik.com.





