Best Sealant for RV Roof of 2020: Top 6 Picks

Last update: Sep 20, 2020

Sealing your RV roof to prevent any leak and add extra protection to the roof. It also helps to reduce the heat inside, so save you a significant fuel for the air conditioner. Sealing your RV roof will save you a lot of costs in the long run. If you are finding a sealant to re-seal your RV roof, this article is for you.

Here are the best sealants for rv roof you can buy in 2020:

  • Best Overall: Geocel Clear GC28100 Pro Flex Rv Flexible
  • Quick Patching: Cofair UBE425 Quick Roof Extreme
  • Best for Horizontal Use: Dicor 501LSW-1 Self-Leveling Lap Sealant
  • Versatile & Durable: XFasten Black Butyl Seal Tape
  • Best for Uniquely Shaped Joints: Dicor BT-1834-1 Butyl Seal Tape
  • Best for Sunny Environments: EternaBond RSW-6-50 RoofSeal Sealant Tape
6 Best Sealants For RV Roof
Best Overall
Geocel Clear GC28100 Pro Flex Rv Flexible
    Quick Patching
    Cofair UBE425 Quick Roof Extreme
      Best for Horizontal Use
      Dicor 501LSW-1 Self-Leveling Lap Sealant
        Versatile & Durable
        XFasten Black Butyl Seal Tape
          Best for Uniquely Shaped Joints
          Dicor BT-1834-1 Butyl Seal Tape
            Best for Sunny Environments
            EternaBond RSW-6-50 RoofSeal Sealant Tape

              Best Overall: Geocel Clear GC28100 Pro Flex Rv Flexible

              Geocel Clear GC28100 Pro Flex Rv Flexible
              Geocel Clear GC28100 Pro Flex Rv Flexible
              9.2Outstanding
              Pros
              • Crack resistant & Great flexibility
              • Great Adhesion & Longevity
              • Suitable for a wide range of surfaces
              • Easy to apply; horizontally or vertically
              Cons
              • Cannot apply an extra layer after drying

              Geocel Clear GC28100 Pro Flex Rv Flexible is my top pick for RV roofs. First, it can be applied on all RV materials, even damp, frozen, and oily surfaces - a very one-for-all sealant. The sealant has great adhesion; plus, it has great flexibility so it is fairly crack-resistant. This sealant will last for many years.

              Geocel Clear GC28100 withstands normal temperature, from -30 to +60 degrees C (-22 to 140 degrees F) - this temperature range covers all cases in RV travels. Moreover, the sealant is very easy to apply. It can be applied both horizontally or vertically. Everybody can use it.

              However, as it is a silicone sealant, you cannot apply an extra layer after drying. When you want to replace the old layer after several years, you’ll have to remove completely the old layer and apply a new layer.

              Geocel Clear GC28100 Pro Flex Rv Flexible Specifications

              Material

              Silicone

              Size

              10 fl. Oz. (296 mL)

              Thickness

              N/A

              Temperature Range

              -30 to +60 degrees C (-22 to 140 degrees F)

              Highlight Features

              Apply horizontally or vertically; Crack resistant

              Geocel Clear GC28100 Pro is a flexible and easy-applying silicone sealant for RV roofs.

              Quick Patching: Cofair UBE425 Quick Roof Extreme

              Cofair UBE425 Quick Roof Extreme
              Cofair UBE425 Quick Roof Extreme
              9Outstanding
              Pros
              • Peel and stick, easily application
              • Does not crack, harden or shrink
              • Suitable for wide range of materials
              • Super adhesion & easy to replace
              Cons
              • Not suitable for silicone-coated roofs

              Unlike Geocel Clear GC28100 Pro, which is a sealant paste, Cofair UBE425 Quick Roof Extreme is a sealant tape. A tape sealant has several advantages over a paste sealant as it is easy to apply and easy to replace. You simply peel and stick the tape on the surface you want to patch - quick and effortless. When you want to replace the old tape, just simply remove the old piece of tape and apply a new piece.

              Cofair UBE425 Quick Roof Extreme won’t crack, harden or shrink. It stretches, withstands hot temperature, and keeps adhesiveness for years. You can apply this sealant tape on a wide range of materials, from EPDM, TPO, metal, fiberglass to aged and rigid PVC, wood, OSB. However, it is not suitable for silicone-coated roofs - note this.

              Cofair UBE425 Quick Roof Extreme Specifications

              Material

              Steel-Loc Adhesive

              Size

              4" x 6'; 4" x 25'; 4" x 75'; 6" x 25'; 6" x 75'

              Thickness

              45 Mils

              Temperature Range

              45 degrees F or warmer

              Highlight Features

              Peel and stick; Does not crack, harden or shrink

              Cofair UBE425 Quick Roof Extreme is a fast and effortless solution for roof patching.

              Best for Horizontal Use: Dicor 501LSW-1 Self-Leveling Lap Sealant

              Dicor 501LSW-1 Self-Leveling Lap Sealant
              Dicor 501LSW-1 Self-Leveling Lap Sealant
              9.6Outstanding
              Pros
              • EPDM Self-Leveling Lap Sealant
              • Withstands extreme temperature
              • Does not stain or discolor materials
              • Flexible, UV stabilized & Waterproof
              Cons
              • Won't work on vertical or even slanted angles

              Dicor Self-Leveling Lap Sealant is made of EPDM (Ethylene-Propylene-Diene-Monomer), which is an excellent sealing material - resistance to heat, water, alkali, acid, oxidation, and UV. The paste withstands from -50°C to +150°C (-60°F to +300°F), nothing can destroy the adhesion. Moreover, it won’t stain or discolor materials.

              Dicor Self-Leveling Lap Sealant is perfect to seal along the roof’s edges, air vents, vent pipes, and screw heads. It works on a wide range of materials, from wood, vinyl, aluminum, fiberglass to EPDM, TPO, galvanized metal, and mortar, concrete. However, it won’t work on vertical or even slanted angles since the paste takes time to dry.

              Dicor 501LSW-1 Self-Leveling Lap Sealant Specifications

              Material

              Ethylene-Propylene-Diene-Monomer (EPDM)

              Size

              4 * 10.3 oz

              Thickness

              N/A

              Temperature Range

              -50°C to +150°C (-60°F to +300°F)

              Highlight Features

              EPDM; heat, water, alkali, acid, oxidation, and UV resistant

              Dicor 501LSW-1 Self-Leveling Lap Sealant is a superior sealant paste for your RV roof.

              Versatile & Durable: XFasten Black Butyl Seal Tape

              XFasten Black Butyl Seal Tape
              XFasten Black Butyl Seal Tape
              9.4Outstanding
              Pros
              • Fast and mess-free application
              • Elastic, smooth, & corrosion-resistant
              • Can be painted over
              • Suitable for tight corners and unusual patterns
              Cons
              • The sides of the tape stick to anything nearby

              XFasten Black Butyl Seal Tape is a super adhesive tape, which is made of butyl rubber and polyisobutene. These materials are also preferred as they are 100% waterproof. You’ll have a fast and mess-free sealant tape. It can also be used for tight corners and unusual patterns thanks to its flexible and super adhesion.

              XFasten Black Butyl Seal Tape withstands extreme temperature of from -70 to 210 degrees F. Moreover, the surface of the tape is smooth and corrosion-resistant; you can also paint over the tape for a seamless surface.

              The only drawback of XFasten Black Butyl Seal Tape is that its sides are too sticky that catches anything. When not using the tape, you can wrap it with toilet paper to avoid this.

              XFasten Black Butyl Seal Tape Specifications

              Material

              Butyl Tape

              Size

              ¾" x 30'

              Thickness

              ⅛"

              Temperature Range

              -70 to 210 degrees F (-57 to 99 degrees C)

              Highlight Features

              Can be painted over

              XFasten Black Butyl Seal Tape is super adhesive, ideal for tight corners and unusual patterns.

              Best for Uniquely Shaped Joints: Dicor BT-1834-1 Butyl Seal Tape

              Dicor BT-1834-1 Butyl Seal Tape
              Dicor BT-1834-1 Butyl Seal Tape
              9.2Outstanding
              Pros
              • Great adhesion
              • Fast stick & fast application
              • Great uniquely shaped joints
              • Easy to remove
              Cons
              • Quite hard to get off the roll

              Dicor Butyl Seal Tape is another butyl tape with great adhesion. However, Dicor Butyl Seal Tape is somewhat easier to remove than XFasten Black Butyl Seal Tape. It sticks to surfaces fast, allowing you to get your jobs done quickly. The tape is thin and elastic that it is perfect for uniquely shaped joints. It is at the best performance at room temperature.

              However, since Dicor Butyl Seal Tape is too sticky and it adheres strongly to the non-stick surface, the tape is quite hard to unroll, causing you some trouble using it.

              Dicor BT-1834-1 Butyl Seal Tape Specifications

              Material

              Butyl

              Size

              3/4" x 30'

              Thickness

              1/8"

              Temperature Range

              Room temperature

              Highlight Features

              Great adhesion; Fast stick & fast application

              Dicor Butyl Seal Tape has great adhesion yet still be easy to remove.

              Best for Sunny Environments: EternaBond RSW-6-50 RoofSeal Sealant Tape

              EternaBond RSW-6-50 RoofSeal Sealant Tape
              EternaBond RSW-6-50 RoofSeal Sealant Tape
              9.6Outstanding
              Pros
              • Great expandability
              • Silicone lining on adhesive side
              • UV stable backing
              • MicroSealant Technology
              Cons
              • High price

              EternaBond RoofSeal Sealant Tape adhesive side uses MicroSealant technology, which is a combination of synthetic resins, thermoplastics, and non-curing rubber for the best adhesion and durability. The adhesive side has a silicone lining on it to avoid sticking around before application.

              EternaBond RoofSeal Sealant Tape has a UV stable backing, which makes the tape perfect for sunny environments. Plus, it has great expandability that can be stretched to wrap around joints and corners. However, EternaBond RoofSeal Sealant Tape has a quite higher price than other sealant tapes above.

              EternaBond RSW-6-50 RoofSeal Sealant Tape Specifications

              Material

              MicroSealant Technology (synthetic resins, thermoplastics and noncuring rubber)

              Size

              2" x 50'; 4" x 50'; 6" x 50'

              Thickness

              35 mil

              Temperature Range

              -70 to 200 degrees F (-57 to 93 degrees C)

              Highlight Features

              UV stable backing; MicroSealant Technology

              EternaBond RoofSeal Sealant Tape has great adhesion, durability, and expandability.

              How To Choose The Best Sealant For RV Roof?

              There are two common types of sealant - paste and tape. The paste type is a better choice for serious tasks since it lasts for years and is very strong. The tape type is somewhat more convenient - it is easy and fast to apply, can easily be removed for replacement. For patching the roof, I recommend using a sealant tape. For joints, corners, air vents, vent pipes, screw heads, I recommend using a sealant paste.

              More things to consider are:

              • Temperature range: For RV trips, you may experience some extreme temperature like on a sunny summer day or on a snowy winter day. The temperature range should be a bit wider than room temperature.

              • Water-proof, heat-proof, UV-proof: Since you want to apply the sealant on the RV roof, it is necessary for the sealant to be waterproof, heatproof, and UV proof.

              • Expandability: For a sealant tape, expandability is a great characteristic as it would be easier when applying around a corner or a joint.

              • Can be used vertically: Some sealant paste products cannot be used vertically (or even cannot be used on an angled surface) as they take time to dry. Some types of paste are quicker to dry so they can be used vertically.

              Which Brands Make The Best Sealant For RV Roof?

              Geocel

              Geocel was founded in 1974; Up to present, it has successfully built a solid reputation of high-quality sealants for many purposes, from resident to industrial uses. Its main concerns are quality, health, and safety. When it comes to Geocel, you are assured of non-toxic and versatile sealants, from polyurethane, silicone, solvent-based to hybrid types.

              Geocel Clear GC28100 Pro Flex Rv Flexible is my top pick the best RV roof sealants. It has great adhesion, longevity, and flexibility; it is also pretty easy to apply, both horizontally and vertically.

              Dicor

              Dicor is a recommended brand from many RV travelers. It was founded in 1984 as a supplier of component products to RV manufacturers. Decades of experience help Dicor gain a massive understanding of what would be the best for RV; thus, they decided to become an independent brand that produces RV aftermarket products, such as roof sealants and wheel covers. As they have advantages of manufacturing, they can offer the highest quality products at a very reasonable price. Up to now, they have sold more than a million products. This is a brand that you can trust.

              Cofair

              Cofair is the youngest brand among the three brands I recommend. They are well-known for their membranes and tapes for RV roofs. With more than 25 years of developing these products, they know what customers want and how to make the best sealant for RV roofs. Their tapes with Steel-Loc adhesive are really a game-changer. If you are finding a good sealant tape for your RV roof, Cofair is the to-go brand.

              FAQs

              Why do you need a sealant for rv roof?

              Sealing your RV roof stops/prevents leaks and protects the rubber roof, enhancing its lifetime. Moreover, it regulates the temperature inside, saving energy used by the air conditioner. By doing this little task, you’ll save a lot of costs in the long run.

              How do you seal an RV rubber roof?

              First, clean the rubber roof with a specialized cleaner. Spray the cleaner on the roof, use a brush and scrub the roof, then rinse it off. Wait until the roof dried, coasted it with a UV protection product. Now, you can apply sealant paste or sealant tape on joints, corners, air vents, vent pipes, screw heads, or cracks.

              How often should you seal your RV roof?

              Once a year is ideal. When you use a budget sealant, you may need to re-seal your RV roof sooner. When you use a good sealant, it can well protect your roof for several years. However, a year is a reasonable period to re-seal your RV since “Prevention is Better than Cure”.

              How to remove RV roof sealant?

              You won't want to use a tool with sharp edges as it may scratch your roof. It would be better to use a plastic putty knife. Just gently shimmy the knife around the sealant until it lifts.

              How much does it cost to reseal an RV roof?

              You will need a cleaner, UV stabilizer, and a new sealant. These would cost several hundreds of dollars.

              Conclusion

              Sealing your RV is the best way to protect and enhance the roof lifetime. I hope this review helps you choose the best sealant for your RV roof.


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