DRYLOK Original Concrete & Masonry Waterproofer is a latex-base coating for bare masonry that is meant to stop water rather than simply decorate the wall. Unlike a masonry paint, which sits on the surface, it is brushed or rolled into the pores of the substrate so the cured film bridges into the block or concrete and blocks water pushing through from the other side.

The manufacturer rates the Original formula to hold back water at pressures up to 10 psi and to resist 98 mph wind-driven rain, with a semi-impermeable film of less than 1 perm that keeps both liquid water and vapor out. It is applied in a minimum of two coats, the first worked in with a stiff brush, and carries a 10-year warranty when used per the label directions.

Surface prep governs the result: the masonry must be clean, free of paint, form release and efflorescence, and profiled roughly like medium-grit sandpaper, with cracks and floor-to-wall joints patched with a hydraulic cement plug beforehand. The gray ready-mixed color dries flat with a sandy texture and can be tinted in store or top-coated with latex paint after 24 hours.

Key Features

• Latex-base masonry waterproofer that stops water up to 10 psi and resists 98 mph hurricane winds, per the manufacturer
• Semi-impermeable coating rated at less than 1 perm, keeping liquid water and vapor out of the interior side of the wall
• Applied by brush or roller in a minimum of two coats; covers 75 to 100 square feet per gallon depending on surface porosity
• Dries to the touch in about 1.5 hours and recoats in 2 to 3 hours; can be top-coated with latex paint after 24 hours
• Flat finish with a sandy texture; the ready-mixed gray can also be tinted at the dealer for other shades
• Suitable for interior or exterior work, above or below grade, on masonry walls, brick, stucco, cinder and concrete block and poured concrete
• Water-based formula cleans up with soap and water, with no solvent needed for tools
• Carries a 10-year warranty when applied according to label directions

Applications

• Waterproofing poured concrete and block basement walls from the interior
• Coating below-grade foundation and retaining wall faces before backfill
• Sealing cinder block, brick and stucco exterior walls against wind-driven rain
• Treating crawl space and cellar walls subject to seepage and dampness
• Coating masonry walls in garages, utility rooms and storage areas
• Finish coat over patched masonry as part of a basement moisture-control repair

Product Details

• Brand: Drylok
• Product Line: DRYLOK Original Concrete & Masonry Waterproofer
• Type: Masonry waterproofing coating
• Base: Latex (water-based)
• Finish: Flat, sandy texture
• Application: Brush or roller
• Coats: Minimum 2
• Coverage: 75 - 100 sq. ft. per gallon

Specifications

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