RV Roof Coating Application Instructions | RV, Trailer, Motorhome and Camper Roof Repair


How to determine how much Superior RV Liquid Rubber Roofing you will need:

  1. Measure the length of your roof and the width of your roof.
  2. Multiply these two numbers together to find out the surface area of your roof.
  3. Divide this number by 42.
  4. This number is an estimate of how many gallons of Superior RV Liquid Rubber Roofing you will need.

Caution: Apply this product in a well ventilated area. Extinguish all sources of ignition. Uncured product is a flammable liquid. Keep product at room temperature for ease of application.

Preparation for all surfaces except plywood:

Using dish detergent and warm water, scrub or power-wash roof and remove as much surface dirt as possible. Remove all silicone (nothing adheres to silicone), loose caulking and poorly adhering coatings. Flush with clean water and allow to dry completely. 

Preparation for fiberglass:

If surfaces are still shiny, sand with 100 grit sand paper until gloss is removed. Wipe off dust thoroughly.

Application for  EPDM and TPO rubber roof membrane:

Using a brush, apply a light coat of Superior RV to fill all seams, depressions and around all objects protruding through roof (vents, skylights, pipes, etc.), and any areas that cannot be accessed with roller. If your roof membrane has rounded or bullnosed edges, apply a light coat using a brush to the vertical portion and the rounded edge of the bullnose, all around your roof edge. Allow to dry three hours. Apply ONE THIN COAT to entire roof surface using a short nap roller and allow to dry 48 hours. CAUTION: DO NOT APPLY A HEAVY FIRST COAT ON EPDM OR THE RUBBER MAY DISTORT AND WRINKLE. DO NOT APPLY MORE THAN 1 GALLON PER 100 SQ FT ON THE FIRST COAT. (Example: An EPDM roof that is 25 feet long and 8 feet wide is approx. 200 sq ft., so you would not apply more than 2 gallons on the first coat). After at least 48 hours, apply finish coat using long nap roller. If you are unable to complete the second coat because of  inclement weather or time constraints, it is not a problem.  A second coat can be applied at any time within the next week, provided that the roof remains clean and is free of  moisture.

Application for fibreglass, vinyl, plywood, & aluminum (do not use this method for EPDM):

Using a brush, apply a coat of Superior RV to all seams, depressions and around all objects protruding through roof (vents, skylights, pipes, etc.), and any areas that cannot be accessed with roller. Allow to dry at least 3 hours. Pour Superior RV directly onto the roof surface and spread out with a long nap roller. Remember that Superior RV is a coating, not a paint, so it must be applied liberally in order to form a protective membrane. Wait at least 24 hours before applying a second coat. Note: If you are unable to complete the second coat because of time constraints or inclement weather, it is not a problem. The second coat can be applied at any time within the next week, provided that the roof remains clean.

Other information:

  • The shelf life of Superior RV Liquid Rubber Roofing is 3 years in a well sealed container
  • Product can be applied as low as 35F (Please note that the colder the temperature, the longer it will take to cure)
  • Frost will not damage coating that is already applied
  • Superior RV Liquid Rubber Roofing can be applied in temperatures as high as 95F

Precautions: We cannot guarantee proper adhesion to your roof if Superior RV is used on top of old coatings, as our coating is designed to make direct contact with the original surface (eg: epdm, tpo, aluminum, fiberglass). Any coating is only as good as the one underneath it. NOTE: This product is not recommended for use on “Alpha” brand EPDM rubber roof membranes that were manufactured by Alpha Systems, LLC. If you have a rubber roof and are not sure of the type, please consult your dealer or the manufacturer of your RV to be certain before ordering.