FAQs

Yes, provided you can safely access and work on the roof. Always follow the RV manufacturer’s recommendations regarding roof access and use appropriate fall protection and safety precautions when working at height. RV roof coating is one of the most DIY-friendly roofing projects. The roof is accessible, relatively small (typically 200–400 sq ft), and most coatings apply with a brush or roller. No special equipment is required for most products.

Look for these signs:

• Chalking or fading on the existing membrane
• Small cracks, checking, or crazing in the surface
• Soft spots indicating moisture has gotten in
• Visible seam separation or flashing gaps
• Water stains on interior ceilings or walls
• The roof is 5+ years old and has never been coated

Most manufacturers recommend recoating every 3–5 years depending on climate, usage, and the product used. RVs in hot, sunny climates or that are stored outdoors year-round may need more frequent attention.

Knowing your roof type is essential before choosing a coating product. Most RVs have one of four roof types:

• EPDM rubber — most common, black or white rubber membrane
• TPO — thermoplastic polyolefin, typically white
• Fiberglass — rigid, found on higher-end coaches
• Aluminum — found on older or vintage RVs

Yes — liquid rubber is one of the most popular choices for RV roofs, especially EPDM membranes. It’s highly compatible, extremely flexible, easy to apply, and provides excellent waterproofing.

It depends on the product and substrate. Road Guard XD TravelPRO and Liquid Rubber do not require a primer. However, fiberglass and some metal roofs may benefit from a primer coat for better adhesion. Always check to make sure you know what you are coating.

Multiply your roof length by its width to get square footage, then divide by 100. Liquid Rubber Roof Coating needs 3 gallons per 100 sq ft (1.5 gallons per coat, 2 coats). XD TravelPRO needs 2 gallons per 100 sq ft in a single coat. For a typical 35 ft RV (about 280 sq ft), plan on about 9 gallons of Liquid Rubber or 6 gallons of XD TravelPRO. Always buy slightly more than calculated so you don’t run short mid-job.

It depends on your roof substrate:

• Polyurethane — best durability and abrasion resistance, good for roofs with foot traffic
• Liquid rubber — best for rubber and metal roofs; highly compatible and flexible
• Silicone — excellent UV and ponding water resistance but harder to recoat later
• Acrylic — good budget-friendly option; easy to apply

Yes, once fully cured, both liquid rubber and polyurethane coatings can handle light foot traffic for maintenance purposes. Polyurethane coatings offer the best foot traffic resistance. Avoid dragging equipment or sharp objects across the surface. Silicone is the slickest when wet.

A properly applied, quality coating should last 5–10 years on an RV roof depending on:

• Product quality and type
• Number of coats and total mil thickness applied
• Climate and sun exposure
• How often the RV is used and stored outdoors
• The amount of debris and foot traffic

Yes — liquid rubber and silicone coatings in particular are excellent for areas where water pools. RV roofs are typically flat or have very low slope, so ponding water resistance is an important feature to look for.

A coating can stop minor seepage and seal hairline cracks, but it is not a substitute for proper repair of significant leaks, tears, or seam failures. Identify and repair the source of any active leak with sealant first, then coat over it.

You don’t need to remove them, but you may need to temporarily remove the cover or mask them off carefully with painter’s tape and plastic sheeting to avoid getting coatings and sealants in undesired areas. Pay special attention to sealing around the bases of all rooftop fixtures — these are the most common leak points on RV roofs.

Proper roof preparation is critical:

• Clear the roof of all debris
• Clean thoroughly with an RV Roof Wash cleaner/degreaser
• Rinse completely and allow to dry fully
• Inspect and repair any cracks, tears, or seam separations with sealant, butyl fabric tape or polyester fabric
• Mask off vents, AC units, and other fixtures
• Allow all repairs to cure before coating

Use a liquid rubber sealant (Liquid Rubber Roof Sealant, SEBS Sealant) or polyurethane sealant (XD TravelPRO Roof Sealant) to fill cracks and reseal any open seams. For larger repairs, embed polyester or fiberglass reinforcing mesh into the sealant for added strength. Allow all sealant repairs to cure fully — typically 24–48 hours — before applying the coating.

Use a dedicated Roof Wash cleaner/degreaser — one that’s compatible with your roof membrane type. Avoid harsh solvents on rubber roofs. Clean thoroughly, rinse completely, and let the roof dry for at least 24–48 hours before applying any coating. Unapproved cleaners may leave a film that can affect adhesion of your roof coating and sealants.

Most roof coatings require a minimum application temperature of 40°F and should not be applied if temperatures will drop below freezing within 24 hours of application. Solvent-based formulas generally have better cold-weather application tolerance. Both Road Guard roof coatings (Liquid Rubber Roof Coating and XD TravelPRO Roof Coating) are solvent based.

Each of the coating types (Liquid Rubber, Polyurethane, Silicone & Acrylic) can and will be different. Some have more steps than others. The general process is as follows:

• Address any existing leaks or bad seams with like materials or the appropriate sealant.
• Stir the roof coating thoroughly before use.
• Cut in around all edges, vents, and fixtures with a brush.
• Roll the coating in even, overlapping passes across the field of the roof.
• Work in manageable sections.
• Apply a second coat perpendicular to the first once the first coat is dry.
• Allow full cure before exposing to rain or foot traffic.

It can vary a lot by weather conditions, time of year and area of the country. Typically 12-24 hours between coats or waiting until the next day under normal conditions (65–85°F, moderate humidity). The first coat should be dry. Light pressure of your finger on the coating should not leave an impression. In cooler or humid conditions, wait longer.

Surface dry (touch dry) typically occurs in 2–6 hours. Full cure usually takes 48–72 hours under normal conditions. Full waterproofing performance may take several days in cooler or humid conditions.

Most manufacturers recommend two coats minimum for a complete, reliable membrane but some products can be done in one coat. Typically you will want 20–30 mils thick of dry roof coating on your unit for a full RV roof system. For reference a typical credit card is 30 mils thick.

For most DIY applications you will need the following:

• (1-2) 9-inch roller with a 3/4” nap cover (non-shedding solvent resistant cover)
• Brush for cutting in around edges and fixtures
• Paint tray
• Painter’s tape and plastic sheeting for masking
• Stir stick
• Gloves and safety glasses
• Ladder or step stool for access

Ideal conditions are:

• Temperature between 40–130°F
• Low humidity (below 50% RH)
• No rain forecast for 24–48 hours
• Overcast or mild sun — avoid application in direct intense sun as the coating can skin over before it levels properly
• Light to no wind

In most cases yes — this is one of the key advantages of liquid rubber, polyurethane and acrylic systems. Clean the existing coating thoroughly, repair any failed areas, and apply a fresh coat. Compatibility between products matters — same brand and product line is safest, or check the manufacturers’ compatibility guidelines. Silicone systems are difficult to work with.

• Inspect the roof at least twice a year — spring and fall
• Remove any debris that may accumulate on the roof
• Clean periodically with a mild soap and water solution
• Re-inspect seams and penetrations after any significant travel or weather event
• Address any small cracks or areas of wear promptly with touch-up sealant

Common warranty exclusions include:

• Application over an improperly prepared surface
• Application outside recommended temperature ranges
• Insufficient dry film thickness
• Application over incompatible existing coatings
• Physical damage
• Failure to follow manufacturer’s application instructions

Typical DIY supplies include a cleaner/degreaser, sealant for repairs, roof coating, and basic tools. Total DIY cost is roughly $300 to $900, depending on the length of your RV and the product you choose. Professional application typically runs $1,500 or more, depending on roof size, repairs, and condition.

For most RV owners, DIY is absolutely worth it. The job is straightforward, the roof is small and accessible, and the savings are significant. The key is proper prep — cleaning and sealing before coating makes the difference between a coating that lasts and one that fails prematurely.

A roof coating is much less expensive, faster and more DIY friendly than a membrane replacement. Typically a coating will be 25-40% of the total cost to replace the membrane.

Yes, you can apply multiple coats to build up extra protection. We recommend 2 coats when possible.

Treat it first with Road Guard Rust Converter. It converts existing rust into a stable, primer-like surface so your XRC topcoat adheres properly, rather than risking paint failure over untreated corrosion underneath.

XRC-110 is a thicker, heavier version of XRC-106, so it has a higher viscosity and takes longer to dry and cure.

Nothing bad will happen to the end product, but visually the product will run or drip if applied too heavily.