R400 Rubber Waterproofing is a liquid applied system that dries as a thick sheet of rubber. It can be used to waterproof virtually any roof surface, including tile, gravel, foam, metal, shingle, etc…
- Surface Preparation: This product must be applied to a clean, dry, and stable surface. It may be necessary to use a pressure cleaner to remove dirt and mildew. Most surfaces will require treatment with Pro Bond 200 sealer, to ensure that the R400 Rubber adheres properly.
- Seal cracks & crevices: In order to ensure that the rubber waterproofing dries as a uniform sheet of rubber, it is necessary to seal all tile joints, water-eyes, and seams. This can be done with NP-1, Cement Catalyst/Slurry Mix, or with Joint Fill for shingle roofs.
- Polyester Membrane: If you are coating a roof with standing water sections, you will need to install the Polyester Membrane in those areas. This will strengthen the rubber coating to ensure it will not breakdown with constant ponding water.
- 1st Coat of Rubber: Roll out the first layer of R400 Rubber. If installing with the Polyester Membrane, you will roll the rubber over the membrane. Apply generously to achieve a uniform first coat. Dry time is between 1-4 hours, depending on temperature and humidity.
- 2nd Coat of Rubber: Apply a second and final coat to ensure that the proper thickness is achieved. This is required in order to meet manufacturer standards and qualify for the manufacturers warranty.
No top coat is needed over R400 Rubber. Be sure not to install R400 when the temperature is below 50F. Do not install if rain or freezing is in the forecast. See Product Specs and Pricing.