If you have an existing epdm roof we suggest a very light coat ( a flash coat) first 1 gallon per 200 sq ft. Once the product dries the actual main coat will be at 50 sq ft per gallon. Divide your total length times 8 feet wide to get your total square footage and divide by 50 that will tell you how many gallons you need then add one additional gallon for your flash coat. When Applying the product simply chalk off your roof into sections 5 feet apart. Each section 8 feet wide by 5 feet long. Once you have filled on one of those sections you should be done with a gallon of the product. Depending on the age of your roof and condition of the original epdm roof not applying a flash coat may cause the coating to loose adhesion over time. Our customers; particularly our RV shops over the years have told us they like the flash coat.
Roof Preparation and Application process
We suggest performing an inspection of your roof. Look for any separations in your seams. Also around your joints, AC’s and vents check for any loose caulk or areas where caulk may be needed. Our Rubex caulk has been field tested to be compatable with our RVroofMagic, so it will not void the warranty. Be sure any silicone caulk currently on the roof is replaced with the Rubex caulk.
A light power wash if you have one is great otherwise a good bristle brush. Wash your roof with TSP or a degreaser to remove oily residue. The roof must be clean, dry and free of any oil, grease, dirt or loosely adhered coating. You can use either Simple Green or Dawn dish washing detergent along with a soft bristle brush to remove any dirt. We also suggest adding two cups of Clorox for every gallon with the detergent to kill any mold spores that may be growing on the roof. The product is applied at approximately 50 sq ft per gallon. The easiest way to accomplish this is to chalk off your roof into 5 X 10 areas. Once you are done filling in one of those areas you should be done with a gallon of the RvRoofMagic. Be sure your roof is perfectly dry before application. Many customers will tape off their roof with the blue painter’s tape to avoid any possible running. RVroofMagic is ready to use; thinning is not required. Mix for approx. 5 minutes with an electric drill. Application of the product is with a medium nap roller (3/8 inch) not a foam roller and paint brushes around the corners and vertical surfaces. Be sure to put the lid on the can while you are applying the product. Failure to do so will allow the product to continue to cure and will become unstable and very thick. The product has a 5 year shelf life as long as you affix the lid properly so air does not get in. Average dry time: Dry to touch in 3 - 4 hours. Wait a full 24 hours before traveling. Should you choose "to apply" a second coat you will need to wait 24 hours. Rain should not be in the forecast on the day you apply the product. However, should a very light rain fall within 2-3 hours of application the roof is already protected. You may see rain dimples on the surface depending on the strength of the rain. If seams are not properly adhered it may cause the tape to “bubble” up or raise as will a rubber roof that lost adhesion to the wood substrate. Applying the product too thick will cause it to wrinkle.
This product is for outdoor use. If you choose to use it indoors you will need a Niosh respirator available at Home Depot or Uline. As the product begins to dry any brush or roller marks will disappear and what is left is a seamless coating. It will be as if someone just installed a custom fit piece of membrane just for your RV. Apply today and drive away tomorrow! It’s that easy. Clean up is with Xylene available at any paint store.
NOTE: For coating over existing EPDM roofs we suggest a very light (flash coat) approximately 6-8 mils or 200 sq ft per gallon first. Let dry then follow up with the actual main coat at 35-40 sq ft per gallon. This will result in a 20 wet mil and allow for significantly better adhesions. Depending on the age and overall condition of the epdm roof not applying the flash coat may cause the coating to loose adhesion over time.
We also have this sentence Product is to be used within a month of receipt. Please change it to say. The product has a 5 year shelf life as long as you affix the lid properly so air does not get in.