Liquid Rubber Foundation Sealant/Basement Coating

Due to Computer Monitors, Colours may not be exactly as shown.


We believe everyone should have a choice to buy high quality, environmentally friendly products. We believe you should have a choice to do your own projects (most of the time you can do it better yourself than hiring someone) and save money. We believe in Free Shipping (over $75) and Free Returns. We believe in making your experience the best it can possibly be.  Please, please reach out to us with any questions.  We want to make your project a success.



Liquid Rubber Foundation Sealant/Basement Coating

  • ENVIRONMENTALLY FRIENDLY - Liquid Rubber Foundation Sealant is water based, containing no Solvents or VOC's.  This means it's safe to use indoors and outdoors with no special breathing apparatus like solvenated products need.  You're safe, your children are safe and your pets are safe.  We believe you should have a choice in purchasing high quality products that are safe for you and the environment
  • USED FOR - Foundations, ICF's, Basements, Shower Liners, Deck and Fence Posts, Planter Boxes, Metal, Wood, Concrete and more....
  • EASY TO APPLY - Basically just like painting except you use heavy coats to build up your waterproof membrane.  Open the container and start using.  You can close the container and use later if you have left over material.  No pot life or working time like 2 component products.  Apply by Brush, Roller or High Quality Piston Paint Sprayer
  • HIGHLY FLEXIBLE - Final membrane has over 900% Elongation.
  • FOR A BULLETPROOF SYSTEM - Bridge joints, seams, vents, gaps, protrusions…. With LIQUID RUBBER SEAM TAPE or LIQUID RUBBER GEO-TEXTILE where possible movement may occur.
  • Not meant as constant walking surface due to tackiness



  • Flat/Ponding Surface

    Apply a minimum final thickness of 1 gallon per 15sq ft (1.4 sq/m). It should require around 4-5 heavy coats to achieve a 60-80 mil. (1.5-2mm) (DFT) membrane.

  • Vertical Surfaces

    Exterior Foundation Wall

    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.

    Interior Foundation Wall

    Apply a minimum final thickness of 1 gallon per 50 sq ft (4.6 sq/m). It should require around 2-3 heavy coats to achieve a 20-30 mil. (0.5-0.76mm) (DFT) membrane.




  • Apply using a 3/8 (10mm) roller, brush or appropriate paint sprayer.
  • Apply to a clean, dry surface that is free of dirt, silicone, loose paint, rust, oil, grease, coal tar, or other contaminants.
  • Apply when temperature is above 5˚C/41˚F or 10˚C/50˚F and rising depending on product selected.
  • For extra adhesion, performance and longevity and to create a moisture vapor barrier, use 1 heavy coat of Multi-Purpose Primer.
  • Apply each coat in an alternate direction to the last coat to ensure even coverage.
  • Apply next coat when dry to the touch with nothing wet underneath and is uniform in color. (refer to product data sheet for dry times)
  • Avoid contact with solvents and solvent based cleaners, adhesives, and paints.
  • Do not allow to freeze.
  • Do not combine Black products with Colored products.
  • Wrap brushes in plastic to use for next coat.
  • Remove painters tape/blocking while coating is still wet.
  • Not meant for long term UV exposure.
  • Not meant as a constant walking surface.
  • Initial cure (set) within 24-48 hours as per specific product recommendations.
  • Curing depends on temperature, humidity and airflow and specific product used.
  • Extend rain gutters and slope grade away from your building.
  • Ensure weeping tile is working properly channeling water away from your building.
  • Make sure what you’re coating is at least 5 degrees above the dew point of the environment you are coating in. (See technical specs for more details)
  • For best results remove existing paints/coatings and apply directly to the substrate. (Some paints and coatings will not be compatible. Loose/flaky paint may be an indication that the existing paint/coating is not well bonded and therefore your Liquid Rubber solution may fail if applied over it instead of directly to the substrate. Oil based paints, enamels, epoxies, powder coats can be difficult to bond to. Contact your Liquid Rubber technical representative for further direction.)
  • It is always a good idea to apply a small test patch in an inconspicuous area to ensure adequate adhesion prior to full application.
  • Do not apply in wet conditions or if rain or dew is forecast within 24 hours.




Customer Reviews

Based on 62 reviews
Gary Ohlrich
Top Drawer

I spent literally hours over the past several months searching for and evaluating products that would provide a firm waterproof coating to the outside foundation of my workshop/storage building. For several years I have dealt with seepage between the slab and row of concrete blocks. After three different attempts to solve the problem, I settled on Liquid Rubber Sealant. The results have been amazing. I applied four coats of sealant and was immediately impressed with how firm and heavy the coating set up. Great product and I will share my satisfaction with others. A pleasant bonus was how great the company was in processing the order and arranging delivery. I had my product in hand in but a few days, while I had been prepared to wait for 10 to 14 days, since it was sent from Canada. Hats off to our Northern friends!

Henry Smith
Great stuff!

Bout to paint/seal my basement walls, love the outcome. Gives the office down there a fresh look while keeping moisture out.

Carl Hackling
Liquid Rubber

I like that it’s brown when it goes on and it dries black. That makes it easy to see when you’re coating over.

Robert Ko

Liquid Rubber Foundation Sealant/Basement Coating

Reid Faddis

haven't used it yet waiting for the weather to warm abit. I don't have to worry about it harding. to I


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