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Block & Wall elastomeric coating for waterproofing wallsAMES'® Block & Wall
Do-It-Yourself in Three Easy Steps

Ames' industrial-strength coatings are easy to apply for the Do-It-Yourselfer. Most Ames products may be applied by brush, roller, push broom, or sprayer. Ames Block & Wall elastomeric paint is nearly three times as thick as most paints. It is best applied with a roller but can be sprayed and back rolled. The product can be thinned up to 10% with water. Depending upon the roughness of the surface, preparation, and the specific application, you may need one or more of the following:

One or more of the following:

  • 4-inch wide paintbrush
  • Utility knife
  • caulking gun for filling cracks
  • Seam Tape or Roof Fabric
  • 1-inch thick nap paint roller
  • Commercial airless sprayer


1 gallon = 100 sq. ft.
5 gallons = 500 sq. ft.
55 gal. drum = 5500 sq. ft.
275 gal. tote = 27500 sq. ft.

Clean up tools and small spills with water.


Read all label instructions before beginning. Always run a test patch first in an inconspicuous area, to ensure that proper adhesion and drying occurs and the product works to your satisfaction. Careful and complete preparation will ensure the best results and contribute to the life of the coating. The wall surface must be clean, dry, and free of loose material. Loose or peeling paint should be removed with a wire brush and rough wood surfaces sanded. Metal or concrete surfaces may be prepared by using a disc grinder and carborundum disc. Care should be taken so as not to grind though the metal. Do not apply Block & Wall over wet, loose or crumbling concrete. Repair the concrete and allow to cure. Mildew may be removed with a power washer. All major cracks, joints and seams should be caulked with Blue Max trowel-grade liquid rubber. Do not use a silicone caulk. Follow seam taping instructions. Mask all sensitive areas before starting.Follow seam taping instructions. Mask all sensitive areas before starting. Shake or stir Block & Wall Liquid Rubber prior to use.


It is important to seam tape all joints and cracks to avoid future cracking and leaking. Seam tape flashing to wood; wood to wood; concrete to wood; metal to wood; brick to wood; etc. Apply around flashings, windows and cracks in the walls. Refer to Ames Seam Tape label (PS250, PS450, PS650) for application instructions. Do not use fiberglass or asphalt impregnated seam tape.

More about Seam Tape



Ames Block & Wall waterproofing paint may be brushed, rolled or sprayed. Apply a minimum of one gallon per 100 sq. ft. per coat. Two coats minimum is best, three to four superior. The application must be applied in a continuous, unbroken seal of a minimum dry thickness of no less than 30 mils (the thickness of a dime) over the entire surface.

GOOD: One to two coats of Ames Block & Wall elastomeric waterproofing paint covers and waterproofs, in most cases.

BETTER: Two to three coats or three gallons of Block & Wall per 100 square feet.

BEST: The very best product application is five gallons per 100 sq. ft. or three to five coats. Fabric can be applied over smooth surfaces for additional reinforcement of concrete or wood surfaces but is usually not necessary unless the surface is in danger of deteriorating. Apply three coats followed by two coats (2 gallons per 100 square feet) of Ames Block & Wall waterproofing paint.

Click here for Architectural Specifications

Block & Wall is best applied on warm clear sunny days when the humidity is less than 50% and the following conditions are met: 1) The sun is in the sky. 2) There is no forecast of rain for at least 24 hours. Apply at 40 - 90 degrees F. Always do a test patch to assure proper drying conditions.

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