BEHR PREMIUM® Concrete & Masonry Cleaner/Etcher No. 991

BEHR PREMIUM® Concrete & Masonry Cleaner/Etcher No. 991

Formulated as an interior/exterior 2-in-1 cleaner and etcher, use this biodegradable product to prepare the surface prior to coating. Designed to clean and etch bare concrete and masonry, resulting in an improved penetration and adhesion of paints, stains and sealers. Easy water clean up removes grease, auto fluids, rust and red clay stains from any concrete and masonry surface. Ideal on surfaces such as garage floors, driveways, walkways, patios, basement floors and walls.

Tech Data Sheet HERE

Available In

  • Concrete & Masonry Cleaner/Etcher No. 991 - MSDS

Where to Use

  • Use on Interior/Exterior uncoated surfaces such as: Garage Floors, Driveways, Walkways, Patios, Basement Floors and Concrete Walls.
  • Removes grease, oil, auto fluids, rust and red clay stains.
  • NOTE: If etching is not desired, use BEHR® CONCRETE & MASONRY CLEANER/DEGREASER NO. 990.
  • Preparation

  • New concrete must cure for a minimum of 30 days.
  • Wipe up all excess oil and grease spills.
  • Scrape and sweep away dirt and loose contaminates on the surface.
  • Completely strip all existing coatings using BEHR® CONCRETE & MASONRY PAINT STRIPPER NO.992 prior to use. Be sure to rinse thoroughly before treating with BEHR® CONCRETE & MASONRY CLEANER/ETCHER NO. 991.
  • Protect grass and any nearby plants by dampening these areas with water and covering with plastic drop cloths.
  • Prevent all rinse solution from entering storm drains.


  • DO NOT MIX IN A METAL CONTAINER. Use a plastic mixing container, large enough to hold up to 2 gallons of diluted solution.
  • Use full strength on hard to clean interior/exterior stained surfaces and smooth concrete. Always work in a well-ventilated area.
  • For new and lightly stained concrete or to etch galvanized metal, use a diluted solution of 1 part NO. 991 to 1 part water (1:1 dilution).
  • Stir diluted solution thoroughly. Avoid splashing.


  • Wear protective clothing, goggles and acid resistant rubber gloves & boots.
  • Avoid splashing. Spraying is not recommended.
  • One gallon of full strength product will etch and clean 150-200 sq. ft. (14-18 m2). One gallon of diluted solution will etch and clean 300-400 sq. ft. (28-37 m2). Actual coverage depends on porosity and severity of surface.
  • For best results, use a plastic watering can to evenly distribute product or spread product using a stiff bristled, non-metal brush or broom.
  • On sloped surfaces, start at the lowest point working up to the highest point.
  • Apply BEHR® CONCRETE & MASONRY CLEANER/ETCHER NO. 991 to a dry surface for best results.
  • Allow product to stand for 10-20 minutes then scrub vigorously.
  • Do not let product dry on the surface.
  • Rinse surface thoroughly with fresh water while scrubbing at the same time to properly remove all remaining residue. Pressure wash for best results. Remove excess water with a non-metal squeegee or mop. NOTE: Heavily stained areas or older stains may require an additional application.
  • The surface is ready when it feels like medium grit sandpaper and no residue or loose concrete remains on the surface.

    Clean Up

  • Thoroughly rinse all surfaces, clothing and tools with fresh water after use.
  • For disposal of unused paint products, please contact your household refuse collection service.
  • If product comes in contact with painted or finished surfaces, rinse immediately with fresh water.
  • Important!



    WARNING! If you scrape, sand or remove old paint, you may release lead dust. LEAD IS TOXIC. Contact the National Lead Information Hotline at 1-800-424-LEAD or log on to

    When you need a paint for interior and exterior surfaces, try Behr Masonry, Stucco & Brick Paint Satin. It is self-priming and mildew resistant while repelling water on virtually all interior and exterior surfaces. This water-based paint dries to a natural look. Look for product safety information on