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.

INSTRUCTIONS: Apply in a well-ventilated area. Do not use indoors. 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 fiberglass and vinyl: 

Do NOT use RV rubber roof cleaners as many of these contain protectants that prevent adhesion of coatings.

Use Tide® laundry detergent and warm water, scrub or pressure wash roof and remove as much surface dirt as possible. Remove all oily residue, silicone sealant, loose caulking and any coatings that are peeling. Flush with clean water and allow to dry completely. 

Caution: Do not coat over a roof that has been leaking without first checking to see if there is water trapped in the ceiling insulation. Once the roof has been coated, trapped water will not be able to escape and will eventually rot the roof members and underlayment, causing catastrophic roof failure. This condition can also cause bubbles to appear in the coating. Open the ceiling from the inside and replace any wet insulation materials prior to coating the roof. If the underlay has rotted, you must remove the roof membrane, replace the wooden sheets and follow the instructions for plywood or OSB below.

 

APPLICATION TO EPDM:

Do NOT use RV rubber roof cleaners as many of these contain protectants that prevent adhesion of coatings.

Use the Alpha EPDM kit with Superior 100 primer that suits the size of your RV. Superior 100 Flexible Epoxy Primer is heat and moisture sensitive. High temperatures and humidity will accelerate the cure time and pot life. Low temperature and or low humidity will extend the cure time.  Recommended surface temperature should be above 50ºF (10ºC) and at least 5ºF above the dew point. Store product at room temperature. If Part “A” is too thick, place can in hot tap water for 30 minutes to reduce thickness. Superior 100 must be top-coated with Superior RV Liquid Rubber Roof Coating between 22 and 30 hours after application. After that, it must be sanded or top coats may not adhere. Surface is ready to topcoat when dry to the touch, but slightly tacky to walk on. 

Mixing: Pick a day when there is no chance of rain. Apply primer after 11:00 AM so it will be cured enough by 10 AM the following day (or after dew has evaporated) before applying topcoat. Do not mix more material that you can use in ½ hour. Use two identical disposable containers, such as 1 qt. plastic measuring cups, pour equal amounts Part ”A” by volume in one, and Part “B” by volume in the other. Pour each of these into a working container large enough to accommodate both “A” and “B”. Mix thoroughly for one minute. Caution: Do not measure weighing. Measure by volume only.

Application: Pour and spread the primer using either a brush, roller or squeegee, making sure entire surface is covered. One heavy coat is adequate and will self-level to a glossy finish. Do not try to spread the product too thin. Allow to dry approx. 22 hours or until dry to the touch, but slightly tacky before applying topcoat.

Caution: Superior 100 must be top-coated with Superior RV Liquid Rubber Roof Coating between 22 and 30 hours after application or it will have to be sanded to allow proper adhesion of the roof coating.

APPLICATION OVER PREVIOUSLY APPLIED ACRYLIC ROOF COATINGS:

All peeling, flaking or poorly adhering MUST be completely removed as they will eventually fail and lift your new coating with them. Use the Alpha EPDM kit with primer and follow the rest of the instruction as shown above for coating EPDM.

 

APPLICATION TO TPO:

Do NOT use RV rubber roof cleaners as many of these contain protectants that prevent adhesion of coatings.

Use the regular Superior RV Liquid Roofing package that suits the size of your RV. DO NOT USE THE PRIMER KIT ON TPO. 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 reached 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 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, the second coat can be applied at any time after the first coat has cured. 

 

 

 

Preparation for fibreglass and vinyl: If surface is shiny, sand with 100 grit sand paper until gloss is removed. Wipe off dust thoroughly. Do NOT use RV rubber roof cleaners as many of these contain protectants that prevent adhesion of coatings.

Use Tide® laundry detergent and warm water, scrub or pressure wash roof and remove as much surface dirt as possible. Remove all oily residue, silicone sealant, loose caulking and any coatings that are peeling. Flush with clean water and allow to dry completely. 

 

Application to fiberglass and vinyl:

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 reached 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 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, the second coat can be applied at any time after the first coat has cured. 

 

Application to Plywood and OSB: As dry plywood is very absorbent, plan on using 15 to 20% more material than you would for regular roof surfaces. OSB usually has a clear temporary waterproof coating on it which should be sanded prior to coating. Apply first coat of Superior RV Liquid Roofing and imbed Superior spunlace fabric into the coating over all seams and joints. Pay special attention to coating the perimeter of all objects that protrude through the roof (vents, pipes, a/c units etc.) as these are big potential leak areas. Force coating into joints and crevices with a brush. Make sure fabric is well coated and allow 36 hours for complete cure before adding more coating. Apply a second, heavier coat over entire surface. 

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: Do not apply this coating directly to Alpha Brand EPDM roof membranes or pre-existing coatings without applying Superior Flexible Epoxy Primer first. If you are not sure if your roof is an Alpha Brand EPDM roof, use the primer anyway, as it works well on all epdm roofs and you will avoid bubbles, swelling and/or distortion on the rubber. The Primer as well as Kits that include primer can be found here.