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RV Roof Coating FAQUpdated 5 months ago


Application

Question: Which products do I use?

Answer: You can use Liquid Rubber RV Roof Coating. 

Question: Do I need a primer?

Answer: Yes. Primer is critical for RV Applications. Use Liquid Rubber EPDM & TPO Primer for EPDM and TPO surfaces and Liquid Rubber Multi-Purpose Primer for most others (Aluminum, PVC, Fiberglass). 

Question: Do I need Seam Tape, Geo-Textile or Lap Sealant?

Answer: Answer: Yes. Seam Tape is the best choice for RV Roofs as it has it's own waterproof membrane and is easy to install (just peel and stick). Geo-Textile is generally used for plywood RV roofs where you're building up a new membrane. These products are used to reinforce against thermal and other movement to prevent cracking in the area's most likely to experience leaking.  Liquid Rubber RV Lap Sealant is used mainly for maintenance of previously sealed vents and joints by aplying over the old Lap Sealant.  It can be used in conjunction with the Seam Tape prior to Priming and Coating. Refer to application guidelines for more information.

Question: How much do I need?

Answer: Answer: To determine how much sealant or primer you need, divide your total square footage by the coverage rate provided. Example: You have a 250 sq ft roof and the RV Roof Coating coverage rate is 1 gallon per 50 sq ft. so 250/50 = 5 gallons of the RV Roof Coating. (Apply in multiple coats until all material has been used.). Coverage rates are expressed in final coverage and will include all coats needed to achieve membrane thickness.  Or use our RV Roof Kit Builder to calculate everything you need by entering the length of your RV - Click here.

Question: What tools do I need to apply my Liquid Rubber products? 

Answer: Answer: Most of our coatings and primers are applied using a brush or 10mm (3/8") nap roller.  Please view the supply checklist found HERE .

Answer: Some of them can be sprayed with airless, light industrial to heavy industrial spray units capable of spraying an elastomeric coating, however most homeowners will not have access to this equipment. 

Answer: Click here to go to our project pages and to download the application guidelines for more information.

Question: Do you have application guidelines/instructions to help me with my installation? 

Answer: Yes. Application guidelines can be found on our project pages (click here) or on our product pages (click here).

Question: Do you have application videos to help me with my installation? 

Answer: Yes. Application videos can be found on our project pages (click here) or on our YouTube channel (click here).

Question: Do I need a new brush/roller every time I apply a new coat?

Answer: If you wrap your brush/roller in plastic (e.g. a grocery bag) you will slow down the curing process and you should be able to use the same brush/roller for your next coat. You can go a step further and place the plastic bag in the refrigerator (Do not allow contact with food)

Question: Can Liquid Rubber products be applied to metal, galvanized metal or aluminum? 

Answer: Yes. With proper preparation and cleaning Liquid Rubber products will protect and waterproof your metal roofs and structures. Refer to our application guidelines for more information.

Question: Can Liquid Rubber products be applied to Fiberglass? 

Answer: Yes. Liquid Rubber products are often applied to fiberglass. As fiberglass formulations can vary a test patch is recommended to confirm adequate adhesion prior to full application. Liquid Rubber Multi-Purpose Primer is required. Refer to our guidelines to read more about how to bond to fiberglass.

Question: Can Liquid Rubber products be applied to EPDM? 

Answer: Yes. Liquid Rubber products can be applied to EPDM with proper preparation and cleaning. Liquid Rubber EPDM & TPO Primer is required. Read our application guidelines for more information.

Question: Can Liquid Rubber products be applied to TPO? 

Answer: Yes. Liquid Rubber products can be applied to TPO with proper preparation and cleaning.  Liquid Rubber EPDM & TPO Primer is required. Read our application guidelines for more information.

Question: Can I coat over Dicor or other Lap Sealants?

Answer: The first thing to do is inspect and replace degraded lap sealant as necessary using Liquid Rubber RV Lap Sealant. 

Answer: You can apply over most cured lap sealants that are clean and dry. Some Lap Sealants may have high solvent contents so it is important to be sure they are well cured so that active solvents do not deteriorate your coating. Some lap sealants may be silicone based, these will not provide good bond and should be removed and replaced with Liquid Rubber RV Lap Sealant. If you are unsure as to what type of lap sealant you have, it is recommended to perform an adhesion test prior to full application.

Question: Can I coat over Eternabond Roof Seal Tape or other RV Roof Patch Tapes?

Answer: These tapes are often made of TPO or other hard to bond to materials. When applying over the Eternabond Tape you will want to scuff the surface, use Liquid Rubber EPDM & TPO Primer and follow the same process for bonding to TPO roofs (as is outlined in our RV Roof Coating Application Guieline). For other tapes an adhesion test may be necessary.

Question: Can I coat over an existing coating or paint?

Answer: You can apply over most acrylic/latex, polyurethane, alkyd paint, epoxy paints/coatings with the use of our Liquid Rubber Multi-Purpose Primer and using proper cleaning/preparation techniques. Keep in mind that when you apply over an existing coating or paint, if that coating/paint peels, our coating will peel with it as it is bonded to the existing coating/paint and not directly to the substrate. 

Answer: It is recommended to remove oil based or recently applied coatings with high solvent content prior to applying your Liquid Rubber products. (oil and water don't mix and solvents can deteriorate our water-based coatings). If there is an existing Silicone Roof Coating on your RV, use Liquid Rubber Silicone Roof Coating to coat over.  It's always best to walk through your project with Liquid Rubber Tech Support.

Question: Can I apply one of your cheaper bitumen coatings first then coat over that with a white or colored product?

Answer: No. These are not compatible chemistries and will not provide and adequate bond. The bitumen will also eventually bleed through the colored coating.

Question: What if I have a problem or question with an application?

Answer: Our technical support team is here to help you, just reach out to call. email or chat with one of our representatives.

Answer: You very well may find the answer you are looking for in one of our application guidelines, which can be found on our project pages here.

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