Foundations - Exterior - Liquid Rubber Coating

Liquid Rubber Foundation Sealant is a liquid applied coating that cures into a seamless waterproof membrane. Applications include: concrete, wood, cinder block & insulated concrete forms (ICF's). Flexible up to -20C/-4F for exterior; below grade, cold climate applications. This product is water-based and contains no solvents, is VOC-free and is non-toxic.


  1. Ensure a clean, dry surface
  2. Bridge joints, cracks, seams etc., with Liquid Rubber Geo-Textile
  3. Build up heavy coats to achieve required thickness. 40-60 mil (1.5 mm) Dry Film Thickness
  4. COVERAGE - Apply a minimum final thickness of 1 gallon per 20 sq ft (1.9 sq/m). It should require around 3-4 heavy coats to achieve a 40-60 mil. (1-1.5mm) (DFT) membrane.
  5. Exterior Foundation Guideline - Click Link
  6. See below for products used


  • Dust or dirt can cause loss of adhesion
  • Product stays soft, flexible and may have some tackiness
  • Apply the next heavy coat when the product is dry to the touch and nothing is wet underneath.  Tacky is ok
  • Apply material until you use up the required amount
  • Use a roller or brush to apply
  • Apply above 5C (​40F)
  • Curing time depends on temperature, humidity and airflow
  • Protect from backfill with Rigid Insulation or Dimple Board


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