Protectosil® 300 S

Protectosil® 300 S is a clear, penetrating, breathable VOC-compliant surface treatment for use on concrete which creates a deep hydrophobic layer to prevent water and waterborne contaminants from entering the substrate and causing premature deterioration. As an isobutylalkoxy functional silane, this product allows for faster dry times and superior performance on high quality mix designs typical of new bridge decks. By combining ultra-low surface tension with a tailored rate of reaction, Protectosil® 300 S is able to move through the moisture boundary layer that lines the pore structure of the substrate. This permits the development of uniform gradient permeation - a consistent level of protection throughout the entire depth of penetration - allowing for longer treatment life, especially on wearing surfaces.

Typical Applications

For use on cast-in-place, precast, GFRC and high-strength concrete, to protect the reinforcing steel from corrosion due to the effects of water, deicing salts and other waterborne contaminants. Alleviates deterioration of concrete due to alkali-silica reactivity. For use on bridge decks where fast drying is needed to minimize lane closures. For treating heavy-traffic wearing surfaces or areas that receive high salt concentrations (piers, coastal buildings), to provide a highperformance, long-lasting chloride screen.

Benefits at a glance

Protectosil® 300 S is a solvent-free, isobutylalkoxysilane. Protectosil® 300 S penetrates deeper than traditional silane and siloxane solvent- or water-carried systems. This deeper penetration gives a long-lasting resistance against water and chloride intrusion. Protectosil® 300 S’s breathable system greatly reduces the amount of water that enters a substrate, thus promoting a “drying out" of the substrate and reducing the deteriorating effects of water, such as alkali silica reactivity. By incorporating Protectosil® 300 S 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:
• Excellent resistance to chloride ion ingress
• 100% Moisture vapor transmission
• Mitigation of AAR & ASR deterioration
• Deep penetration into substrate
• No change in surface appearance
• No change in surface friction after application
• High resistance to alkali attack
• Long service life
• Excellent performance on wearing surfaces
• Dry time 1 hour at 70°F (21°C)
• Will not inhibit adhesion of paints and line striping

Product Details

Technical Data Sheets

Further Information

Packaging:

Protectosil® 300 S is available in 5-gallon pails, 55-gallon drums or 250 gallon totes. 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, https://silanes.evonik.com/en, or by calling us at 1 (800) 828-0919.

Markets & Applications