PROSOCO 766 Limestone & Masonry Prewash – Carbon Crust Remover (5 Gallon)

HEAVY-DUTY CARBON REMOVER

PROSOCO 766 Limestone & Masonry Prewash is a powerful, alkaline-based cleaning compound designed to dissolve heavy carbon encrustations and atmospheric staining from masonry surfaces. It is typically used as the first step in a restoration cleaning system alongside compatible afterwash or restoration cleaners.

Ideal for brick, limestone, sandstone, terra cotta, and other masonry, this prewash loosens stubborn buildup, reducing the need for abrasive cleaning methods like sandblasting. It is especially effective for heavily soiled areas such as ledges, window sills, and other high-exposure surfaces.

FEATURES / BENEFITS

• Dissolves heavy carbon crust and atmospheric staining
  
• Reduces need for sandblasting and intensive labor
  
• Ideal for heavily soiled and high-exposure areas
  
• Safe for use on a wide range of masonry materials
  
• Will not damage glass or alter masonry surfaces
  
• Easy application by brush or roller
  
• Designed for use with restoration cleaning systems

TECHNICAL DATA

• Form: Colorless gel liquid; soap odor
  
• VOC Content: Not applicable
  
• pH: 13.6 (at 1:5 dilution)
  
• Coverage Rate: 75–200 sq. ft. per gallon
  
• Shelf Life: 2 years (unopened)
  
• Freeze Point: 28°F (–2°C)
  
• Flash Point: Not applicable
  
• Total Solids: Not applicable
  
• Weight per Gallon: 10.6 lbs

AVAILABLE SIZES

• 5 Gallon

RESOURCES

• Product Data Sheet
• Safety Data Sheet
• Safety Data Sheet (Spanish)
• SDS Canadian French