Protectosil® CHEM TRETE PB 350

Protectosil® CHEM-TRETE® PB 350 is a clear, reactive, penetrating sealer for use on exterior above-grade concrete masonry units, brick masonry and most natural stones. This product provides resistance against water, alkali attack, acid rain and waterborne staining by penetrating into the substrate and chemically bonding with siliceous materials to form a permanent attachment of the water repellent molecule. Protectosil® CHEM-TRETE® PB 350 is especially suited for making porous substrates, such as split-face block, water repellent. This water repellent effect stands up against winddriven rain. By penetrating the surface and creating a covalent chemical bond, Protectosil® CHEM-TRETE® PB 350 will prevent waterborne contaminants from entering the substrate, reducing problems such as efflorescence, leaching, acid rain deterioration, scaling, dirt buildup, staining, corrosion of reinforcing steel and mildew. Protectosil® CHEM-TRETE® PB 350 will not cause adverse surface appearance of the substrate. Treated surfaces are fully breathable because the natural moisture vapor transmission is not affected. This will eliminate problems caused by entrapped moisture, including blushing of the sealer and freeze-thaw damage to the masonry.

Typical Applications

Protects materials such as concrete masonry units (split-face, fluted or ground-faced blocks) from the ingress of winddriven rain. Prevents moisture from entering and damaging interior walls and treated brick masonry, especially single wythe wall construction. Keeps masonry cleaner by reducing the amount of dirt and other pollutants that may absorb into the concrete. Other substrates that can be protected include sandstone, terra-cotta, Saint Joe brick, hand-molded bricks and most natural stones.

Benefits at a glance

Protectosil® CHEM-TRETE® PB 350 is a proprietary mixture of alkyltrialkoxysilanes. The Protectosil® CHEM-TRETE® PB 350 is designed to provide a high level of surface beading with penetration, to protect against wind-driven rain. The silane components are unique because they chemically bond to the siliceous materials in the substrate and set up a hydrophobic layer of protection. Because of the silane’s unique chemistry, a long service life is possible. By incorporating Protectosil® CHEM-TRETE® PB 350 into your integrated design, you can earn vital Leadership in Energy & Environmental Design (LEED) credits for both new and existing construction projects.
The main benefits of the product are:
• High resistance to wind-driven rain
• Excellent resistance to chloride ion ingress
• Reduced efflorescence
• Breathable system
• Deep penetration into substrate
• High resistance to alkali attack
• Long service life
• Substrates already treated with Protectosil® CHEM-TRETE® PB 350 can be painted over
• Keeps substrates cleaner

Product Details

Technical Data Sheets

Further Information

Storage:

Store in a well-ventilated place. Keep container tightly closed. Keep cool. Store locked up.

Packaging:

Protectosil® CHEM-TRETE® PB 350 is available in 5-gallon pails and 55-gallon drums. Shipped F.O.B. throughout the United States and Canada. Contact your local Protectosil® representative or your regional manager for specific cost information. You can obtain their contact information on our website, silanes.evonik.com/en, or by calling us at 1 (800) 828-0919.

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