Prosoco Limestone & Masonry Afterwash

Limestone & Masonry Afterwash is a mild organic acid cleaning compound that neutralizes and brightens surfaces that have been prewashed with Sure Klean 766 Limestone & Masonry Prewash. When used properly, this two-part cleaning system removes heavy carbon, dirt, and other atmospheric stains from porous limestone, concrete, and many other porous masonry surfaces.

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Product Type

Neutralizing & Brightening Cleaner for Masonry

Product Description

Sure Klean® Limestone & Masonry Afterwash is a mild organic acid cleaner designed to neutralize and brighten masonry surfaces that have been prewashed with Sure Klean 766 Limestone & Masonry Prewash. This product safely removes residual carbon and other stains without damaging sensitive stone or concrete surfaces.

Key Benefits

  • Safe on Most Masonry: Formulated not to harm limestone, marble, concrete, or other porous materials.
  • Brightening Action: Restores color vibrancy and removes haze from prewash applications.
  • Economical & Easy to Use: Dilutes easily for application via brush, roller, or low-pressure spray.
  • No Harsh Acids: Contains no hydrochloric (muriatic) or hydrofluoric acid.

Best For

  • Limestone
  • Concrete masonry
  • Marble
  • Prewashed surfaces with 766 Prewash
  • Most porous stone surfaces

Product Properties

Property Specification
Form Clear, colorless liquid with a pungent odor
VOC Content Non-applicable
pH 1.10 in concentrate
Coverage Rate 75–400 sq ft/gal. See Product Data Sheet for variations per substrate.
Freeze Point 9° F (–13° C)
Flash Point >200° F (≥93° C) ASTM D 93
Total Solids Non-applicable
Wt/Gal 8.50 lbs
Available Sizes 1-gal, 5-gal
Shelf Life 3 years in tightly sealed, unopened container