Clear Masonry Protector Waterproofer

Thompson’s® WaterSeal® Clear Masonry Protector Waterproofer provides proven waterproofing protection for pavers, brick, concrete, stone, stucco, clay & quarry tile and exterior masonry surfaces.

Key Features

  • Helps Prevent Water Damage
  • Coating Resists Mildew and UV Damage
  • Helps Maintain Natural Color-Dries Clear
Approximate Coverage
50 ft²/gal - 375 ft²/gal
Actual coverage will vary due to the porosity of the surface material.

For Use In Location
Dry Time
24 hour - 3 hour
Recommended Coats
Dry to Recoat
3 day
Package Sizes
1-Gallon, 1.2-Gallon, 5-Gallon
Soap and Water

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Application Directions

  • Before You Begin
    • Be sure that both surface and air temperature are above 50°F during application and for 48 hours after application. Do not apply product if rain is forecasted within 24 hours of application.
    • Perform the splash test. Sprinkle water on various sections of surface to be sealed. If water absorbs and darkens color of substrate within five seconds, surface is porous and considered ready to be treated. If water beads up or otherwise sits on top of surface, then surface does not need protection at this time.
    • Cover plants and shrubs. Move all objects that come in contact with overspray. Wet overspray of product can be removed by flushing immediately with water. Dried overspray can be removed with paint thinner or mineral spirits, following manufacturer’s safety recommendations.
    • Do not use in below grade application where water pressure is a problem, or on painted or recently stained surfaces.
  • Preparation Warning
    WARNING! Removal of old paint by sanding, scraping or other means may generate dust or fumes that contain lead. Exposure to lead dust or fumes may cause brain damage or other adverse health effects, especially in children or pregnant women. Controlling exposure to lead or other hazardous substances requires the use of proper protective equipment such as a properly fitted respirator (NIOSH approved) and proper containment and cleanup. For more information, call the National Lead Information Center at 1-800-424-LEAD (in US) or contact your local health authority.
  • Application
    • Do not mix with other waterproofing products; variations in the final appearance may result.
    • Do not thin.
    • Concrete/Stucco must be completely cured (minimum of 4 weeks) and dry.
    • Shake, stir or mix thoroughly before and occasionally during use.
    • A small trial patch should be tried before application over the entire surface.
    • Only one light coat is necessary in most applications.
    • Apply by brush, roller or sprayer. A garden “pump-up” style sprayer is the simplest method. Product will appear milky white during application, but will dry clear. If puddling of product occurs, remove within 15 minutes by redistributing to dry areas or wiping off.
    • Use only with adequate ventilation.
    • Darkening of the surface and tackiness will result if overapplied. May also occur after application, if overnight temperature falls below 50°F within 48 hours of application.
  • Dry Time
    • Allow at least 24 hours to dry; however drying time will vary depending on the substrate, temperature, and humidity. When completely dry, perform the splash test to determine if second coat is necessary.
    • Allow 45 days drying time before applying latex paint over Thompson’s® WaterSeal® Clear Multi-Surface Waterproofer.
    • Allow a minimum of 3 days drying time before applying oil based paint over Thompson’s® WaterSeal® Clear Multi-Surface Waterproofer.
    • Length of protection will vary depending on environment. Perform the splash test once a year to see whether reapplication is necessary. Vertical and horizontal surfaces will experience color changes at different rates.
    CAUTIONS: Use only with adequate ventilation. To avoid overexposure, open windows and doors or use other means to ensure fresh air entry during application and drying. If you experience eye watering, headaches, or dizziness, increase fresh air, or wear respiratory protection (NIOSH approved) or leave the area. Avoid contact with eyes and skin. Wash hands after using. Keep container closed when not in use. Do not transfer contents to other containers for storage. FIRST AID: In case of eye contact, flush thoroughly with large amounts of water. Get medical attention if irritation persists. If swallowed, call Poison Control Center, hospital emergency room, or physician immediately. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. DO NOT TAKE INTERNALLY. KEEP OUT OF THE REACH OF CHILDREN.

Data Sheets:

Product Number Base/Color Container Size SDS PDS
032053231018 Clear 1 Gallon SDS PDS
032053231056 Clear 5 Gallon SDS PDS
032053231117 Clear 1.2 Gallon SDS PDS