Basement Sealing

Prepare Your Space and Gather Your Materials

All surfaces must be structurally sound, clean, dry, and free from anything that would prevent proper adhesion. Cracks, joints, voids, etc. (1/8” or larger) should be pre-filled with a suitable patching material such as a high-quality wood filler, concrete patch material or Liquid Rubber Sealant & Adhesive (or equivalent).

Concrete should be cured for at least 28 days.

Be sure to perform a moisture test prior to application.

Blight and biological growth must be removed using Liquid Rubber Deck and Patio Cleaner. If already coated, remove any loose/flaking material. Test compatibility before applying your Liquid Rubber Solution. Liquid Rubber Multi-Purpose Primer may be required to bond to an existing coating or provide a moisture vapor barrier. A test patch is recommended to confirm adhesion prior to full application

Masking

Tape-off, block-off, or otherwise mask areas that are not to receive your selected sealant. Remove tape while Sealant is still wet.

The Details

Liquid Rubber 3-Course-Method: For all cracks less than 3mm (1/8’’), cold-joints, non-monolithic inside/ outside corners, pipes, wall/slab, wall/footing, and wall/ wall junctures apply a thick 6’’ wide coat and embed 4’’ wide Liquid Rubber Geo-Textile reinforcement fabric followed by a second coat (known as the 3 Course Method). For all cracks greater than 3mm (1/8’’) prefill with Liquid Rubber Sealant & Adhesive or other appropriate patching materials prior to 3 Course Method.

Apply Coating

Apply your selected sealant when temperature is above 10°C/50°F including overnight. Use a brush, roller, or heavy-duty hydraulic piston spray rig (very thick/viscous material) at a final coverage of 50 ft² per G (4.6 sq/m) or 250 ft² per 5G pail to achieve a damp-proof coating. Generally you can apply 2 generous coats per day. Apply the next coat when dry to touch, is uniform in color and nothing is wet underneath. Tacky is OK. Apply all recommended material. Membrane should be a minimum of 12” above finished grade and down the base of the slab/footing.

Inspect and Protect

Inspect for pinholes, blisters, voids, thin spots or other defects. Repair as necessary.

Allow 48 hours to cure before painting or covering.

Clean Up

Remove tape while coating is still wet and close container to secure leftover product. If spillage occurs, soak up as much material as possible with rags. Clean immediately with soap and water. If spill is dried, scrape off as much as possible with a razor or scraper. Use mineral spirits to weaken product and an appropriate tool such as a wire brush or grinder to mechanically remove. If splashed on the skin immediately wash thoroughly with fresh water. If the product has dried on the skin massage the area with medical grade mineral oil, baby oil or edible oil, then wash with soap and water. If irritation persists seek medical attention.