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Silicone-modified, anti-carbonation, elastomeric waterproof coating

Formerly: Silflex

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Product Data Sheet

Excellent hiding power. It's superior crack bridging and high resistance to wind driven rain insure your investment stays dry. The coating effectively resists passage of atmospheric carbon dioxide, protecting concrete reinforcing steel from corrosion, while permitting the passage of interior water vapor to the outside. Available in a broad range of colors. Product is Master Painters Institute (MPI) approved.


How does MasterProtect EL 850 work? 

MasterProtect EL 850 is a water-based, silicone-modified, elastomeric coating for waterproofing exterior surfaces. It has superior crack-bridging ability with a total elongation of 700%. It retards carbonation of concrete. It complies with Federal Specification TT-C-555B, Type II. 

Recommended uses: 

  • Exterior
  • Vertical surfaces
  • Above grade 

What are the unique features of MasterProtect EL 850? 

  • Available in a broad range of colors
  • Resists wind-driven rain; helps prevent water penetration into the substrate
  • Breathable to allow water vapor to escape
  • Excellent adhesion, bonds securely to substrate for long-term durability
  • Excellent hiding power
  • Low VOC content for broad compliance across all regions
  • Resistant to dirt pickup 

What are the benefits of MasterProtect EL 850? 

  • Silicone-modified acrylic formula is recoatable
  • High elongation and recovery for durable performance over dynamic cracks
  • UV resistance provides excellent color retention for a long-lasting, attractive finish
  • Effective carbon dioxide diffusion barrier, protects embedded steel from corrosion
  • Flexibility at very low temperatures makes it suitable for all climates

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