PROSOCO Blok-Guard & Graffiti Control WB 15 – Water-Based Graffiti & Water Repellent (5 Gallon)

WATER-BASED MASONRY PROTECTOR

PROSOCO Blok-Guard & Graffiti Control WB 15 is a clear-drying, water-based silicone emulsion designed to protect porous masonry surfaces from water intrusion and repeated graffiti attacks. It penetrates deeply while maintaining the natural appearance of concrete block, brick, tile, and natural stone.

Suitable for both interior and exterior use, this treatment helps prevent moisture-related damage while simplifying graffiti removal. Treated surfaces remain breathable and resistant to weathering, making it ideal for long-term protection of masonry structures.

FEATURES / BENEFITS

• Provides long-lasting graffiti protection and simplifies cleanup
  
• Water-based formula with low odor
  
• Effective on hard-to-seal masonry surfaces
  
• Helps control efflorescence, mildew, and moisture staining
  
• Maintains natural appearance—no surface film
  
• Allows surfaces to breathe—does not trap moisture
  
• Excellent UV stability and weather resistance
  
• Can be recoated to refresh or enhance protection
  
• Resists water penetration over hairline cracks (≤ 0.02")

TECHNICAL DATA

• Form: Opaque white liquid
  
• VOC Content: <50 g/L
  
• pH: 9.0
  
• Coverage Rate: 30–175 sq. ft. per gallon
  
• Shelf Life: 1 year (unopened)
  
• Freeze Point: 32°F (0°C)
  
• Flash Point: >212°F (>100°C)
  
• Total Solids: 15%
  
• Weight per Gallon: 8.35 lbs

AVAILABLE SIZES

• 5 Gallon

RESOURCES 

• Product Data Sheet
• Product Data Sheet (Canadian French)
• Safety Data Sheet
• Safety Data Sheet (Spanish)
• SDS Canadian French
• VOC Compliance
• Product Specification
• 3-Part Specification
• Build America, Buy America Act