10 Best RV Sealant for 2020 (Reviews & Buyer Guide)

Update: by
As an Amazon Associate, we earn from qualifying purchases. Learn more

Do you want to seal the roof of your RV?

Do you want to protect your RV from the harmful ultraviolet rays?

Do you want to reduce the wear and tear of the roof of your RV?

If the answer to all the above questions is yes, then all you need is the best RV sealant. The RV sealant not only seals the sealing of the roof of your RV but also protects from the harmful ultraviolet rays by deflecting the sunlight using whitewash. Following are the list of 10 best RV sealant that you can consider before buying:

Reviews of 10 Best Rv Sealant in 2020

1. Dicor 501LSW-1 Epdm Self-Leveling Lap Sealant

Best RV Roof SealantEPDM Lap Sealant is one of the highest volume products sold in RV stores today. It helps creates a watertight seal along the roof edges, around air vents, vent pipes, air conditioners and screw heads. Compatible with EPDM sheeting, it offers excellent adhesion to aluminum, mortar, wood, vinyl, galvanized metal and concrete.

This Self-Leveling Lap Sealant improves the ability to continuously seal and remain flexible. UV stabilized to prevent deterioration and discoloration. Will not stain or discolor any material to which it is applied. 10.3 oz. tubes. This is a self-leveling sealant for clean horizontal surfaces.

I wouldn’t use it on a vertical seam. For that, you may use the ProFlex RV sealant. Both sealants are excellent but they have their own use. The important thing to consider is the condition of the old caulking. If your old caulking is clean and not cracking or coming off then the lap sealant should work for you. If it is in poor condition it will not stay sealed very long, if at all.

2. Gorilla 100 Percent Silicone Sealant Caulk

Best RV SealantGorilla Sealant is great for the kitchen, bath, window, doors, auto, marine plumbing, gutters and more! Ready for water exposure in just 30 minutes, this waterproof sealant is mold & mildew resistant. The clear silicone sealant and won’t yellow, shrink or crack over time!

In order to use this Silicone Sealant Caulk, all surfaces should be clean and free of dirt, grease, oil and old sealant. Best if used above 40F. Unscrew cap, fold and screw-on nozzle. Cut to desired bead size. Apply sealant, pushing bead ahead of nozzle. Smooth bead immediately after application, before a skin forms.

For storage purposes, replace the cap tightly to prevent material from curing. Store in a cool, dry location. To re-use nozzle, remove sealant from nozzle once cured. If you want to clean-up, wipe wet sealant off the project immediately with a dry cloth. Isopropyl alcohol may be used according to the solvent manufacturer’s instructions

3. 3M Marine Adhesive Sealant 5200

Best Clear RV Sealant3M Marine Adhesive Sealant 5200 is a tough, flexible polyurethane for permanent bonding and sealing on your boat or watercraft. It is ideal for use on wood, gelcoat, fiberglass, metal and more. It is recommended for interiors, below the waterline and any other areas that are shielded from sunlight.

This one-component adhesive sealant applies right from the container – no metering or mixing is required. It reaches handling strength in 48 hours, and fully cures in 5-7 days to form a firm, flexible, waterproof seal on joints and boat hardware. Far more than a marine caulk, tough, flexible Marine Adhesive 5200 dissipates stress caused by vibration and shock and won’t crack under dynamic force.

It resists saltwater, wind, weather and temperature extremes for long periods of worry-free enjoyment on the water. In fact, for more than 50 years, 3M Marine Adhesive Sealant 5200 has been used and trusted as a marine sealant by professionals in some of the most demanding conditions on earth.

3M Marine Adhesive Sealant 5200 is extremely strong and retains its strength above or below the water line. Stays flexible too – allows for structural movement. Has excellent resistance to weathering and salt water.

Stress caused by shock, vibration, swelling or shrinking is effectively absorbed. Check the bonding and sealing jobs this product can handle for you: fiberglass deck to fiberglass hull, wood to fiberglass, portholes and deck fittings, motors on fiberglass transoms, under mouldings, hull seams above and below the water line. Center board trunk joints. Between struts and planking. Stern joints. Deck housing, etc. Easy to apply with a manual caulking gun. Won’t sag or flow in vertical or horizontal seams.

For more than a century, 3M has applied innovation and technology to improving our customers’ lives and supporting their business goals. Today the company, from its headquarters in St. Paul, Minnesota, serves industrial and commercial customers and consumers in nearly 200 countries. 3M Industrial Adhesives and Tapes include application-specific products that provide durability, strength and special characteristics such as temperature resistance and short- and long-term protection. The 3M brand, across thousands of products, represents consistency, superior quality, and value.

4. Sashco Through The Roof Sealant

Best Rubber Roof Sealant For RVWhen your roof absolutely and positively needs to be water tight (when doesn’t it, right?), use Through the ROOF! roof repair and roof sealant. Through the ROOF! is a seriously unique roofing caulk that can be applied in the rain! (No, we’re not kidding!)

It sticks to wet surfaces, which means you can fix the leak while it’s leaking. Through the ROOF! sticks to almost any roofing surface – metal, plastic, asphalt, wood, concrete and more.

Plus, it won’t freeze. So, go ahead and fix that gutter during the middle of a Minnesota winter. You might get some concerned stares from your neighbors, but they’ll be grateful the next time you host a neighborhood party and their head stays dry.

Through the ROOF! is elastic, meaning it flexes with temperature changes and wind. It’s ultra clear and stays clear, giving you a sealant that doesn’t yellow over time. Through the ROOF! lasts 20 times longer than asphalt, offers excellent UV resistance, is paintable and made with a low-VOC formula and provides water and mildew resistance.

5. EternaBond RSW-4-50 RoofSeal Sealant Tape

Best RV Rubber Roof SealantThe EternaBond RSW-4-50 RoofSeal tape is white with a 50 foot length and a 4 inch width.

The total thickness is 35 mil. The UV stable backing on RoofSeal makes it ideal for use in sunny environments.

The elongation factor is very high, which permits RoofSeal to expand or contract with changing conditions.

The simple installation only requires some surface preparation before use. RoofSeal can be made to fit around certain objects, as it is able to stick to itself.

RoofSeal adhesive uses MicroSealant Technology, which is a 100% solids formulation consisting of synthetic resins, thermoplastics and noncuring rubber with a built-in primer.

The adhesive side has a silicone lining that prevents it from sticking to other surfaces before application.

6. Geocel 28127V Pro Flex Bright White RV Flexible Sealant

Best Exterior RV SealantPro Flex RV™ Flexible Sealant is specifically designed for the recreational vehicle industry. It can be exposed to any weather condition immediately after application.

Pro Flex RV Sealant has excellent expansion and contraction properties to withstand the joint movement and temperature changes associated with recreational vehicles. It will bond to recreational vehicle materials, even damp, slightly oily, or frozen surfaces.

Product Benefits: Will not crack. Exceptional flexibility. Excellent adhesion to many surfaces, even when damp. Ultraviolet resistant. Resealable; may be applied over itself. Paintable. Resistant to dirt pick-up. Easily applied, non-stringing formulation. Tools and cleans up easily. Mildew resistant.

7. Tremco Vulkem V116GRY 116 Polyurethane Sealant

Best Sealant For RV Marker LightsTremco Vulkem 116 One-Part, High-Performance Polyurethane Sealant One-Part Grainy Textured Finish Primerless Adhesion on Most Common Construction Surfaces Durable and Flexible Seal.

Features and Benefits: Tremco Vulkem 116 has demonstrated superior primerless adhesion to porous substrates for 30 years, and is the choice for sealing expansion joints in commercial construction applications. It can be used exterior or interior with adequate ventilation.

Vulkem 116 is also suitable for certain water immersion applications. Tremco Vulkem 116 is also rated for 25% movement capability. Tremco Vulkem® 116 Sealant is a one-part moisture curing, gun grade polyurethane sealant. Vulkem® 116 is durable, flexible, and offers excellent performance in moving joints. No primer is required on most construction materials, and it applies to conventional caulking guns.

It is an excellent general-purpose sealant designed for use in precast, masonry, glazing, window frame perimeters and similar types of construction joints. Suitable for continual immersion in water with the appropriate primer. Designed for exterior and interior use. The light grainy texture has proven very popular for matching textured substrates like stucco and masonry and for smooth metal storefront joints the light texture blends and hides tooling marks and the wavy effect that is inevitable when tooling sealants.

Color: Gray Contents of Cartridge: 10.1 fl oz (300 ml) Tremco Vulkem 116 Color Chart Joint Design: Vulkem 116 may be used in any vertical or horizontal joint designed in accordance with accepted architectural/engineering practices. Joint width should be 4 times anticipated movement, but not less than 1/4″ (6.4mm).

8. EZ Travel Collection Roof and Window Sealant RV Putty Tape

Best RV Roof Sealant TapeThis roll of Butyl Putty tape lasts longer than most other tapes on the market and won’t crack either. This Butyl Putty tape is commonly used on campers, trailers, and RVs with rubber EPDM roofing since it waterproofs longer than other putties and waterproofs very well.

It is also very commonly used for window seals, flanges, siding and just about everything relating to RVs, Campers, Trailers, boats, etc. Butyl Tru Seal is a non-hardening, off white tough, butyl elastic material that has excellent sealing properties to metal, glass and plastic lap points.

This material increases in adhesion with age after application assuring a long-lasting seal. Features & Specifications Non-hardening Excellent sealing properties Increases in adhesion with age Color: Off-White and dimensions is 1/8 Inch X 1/2 Inch X 30 Feet.

9. Sikaflex-221 Polyurethane Sealant/Adhesive

Best RV Lap SealantSika flex is the most well-known brand of one-component polyurethane sealant/adhesive in the world. This fast curing product provides permanent elastic adhesion to a number of surfaces with excellent cut and tears resistance.

It’s designed to resist the shock and abuse encountered over countless road miles, Silaflex-221 will maintain its strength and adhesion over the long haul.

Sikaflex-221 is weather-resistant, sandable, paintable and NSF approved for potable water and incidental food contact. SikaFlex-221 is the most well-known brand of one-component polyurethane sealant/adhesive in the world. It’s our workhorse.

This fast curing product provides permanent elastic adhesion to a number of surfaces with excellent cut and tears resistance. It is considered by many to be the ultimate choice in truck, trailer, RV and bus manufacturing. SikaFlex-221 is weather-resistant, sandable, paintable and NSF approved for potable water and incidental food contact 221 – 10,14 oz.

10. ToughGrade Self-Leveling RV Lap Sealant

Best RV Sealant CaulkThis RV Lap Sealant helps create a seal along a roof’s edges, around air vents, vent pipes and screw heads. Compatible with any roofing material. It also offers excellent adhesion to aluminum, mortar, wood, vinyl, galvanized metal and concrete.

It improves the ability to continuously seal and remain flexible. Color-matched, the lap sealant is UV stabilized to prevent deterioration and discoloration and will not stain or discolor any material to which it is applied. 10.3 oz. tubes.

ToughSeal Self-Level Sealant seals along roof edges, around vent covers, vent pipes, air conditioners and screw heads.

It is UV-stabilized to prevent deterioration and discoloration. It can be used on use on Horizontal Surfaces too. The product may be in different packaging depending on availability.

Things to Consider Before Buying the Best Rv Sealant in 2020

(1). Good heat contraction and expansion:

Make sure that your RV Sealant is best suitable for the summer season and must be in pure white color. Also, it must not be a hassle for you to remove and install the tape with a small preparation of the surface. It must be light in weight around 3.5 in the pound so that it can allow the access of heat movement by contracting or expanding; making it the best product for you. Consider the white color as it will help in reflecting in the sunlight during the sunny season. It must be available for you in various sizes and amounts.

(2). Fits with the EPDM sheeting:

Before placing the order for your RV sealant you must ensure that it is designed with the greater quality rubber making it the impressive sealant for your roof of RV. You must make sure that your product creates a non-permeable seal for the air conditioner, vent pipe. Thus, making it productive in the feature of sealing the EPDM sheets. Moreover, it does not get stick with the vinyl, mortar wood and aluminum making it capable enough to seal the concrete and metal. It must have a whitewash to reflect in the sunlight and must come in the tube of size 10.3oz.

(3). Provide protection:

You must ensure that your product must have the liquid rubber as a physical feature making it the best choice for you. As it can be easily used in the coating of a mobile home roof or as a rubber roof sealant. To prevent the elements to enter the roof while you are working on the upper part of the roof, then you must find the roof sealant that you may feel easy to use and apply. It must have the feature of resisting the crack which helps in patching up the air vents. With the patching character, the lifespan of your product increases and you can use it for a long period. Moreover, it saves from the impacts of the RV roof sealant. Also, you must choose a product that does not cause any negative effects on the environment. Also, it must be contained inside the gallon can and designed in such a way that it resists the ultraviolet radiation.

(4). Durable:

Choose the product that has the feature which is similar to a caulking gun. Make sure that it can be applied all over the surface effectively as you apply paint and provides protection from the elements for the long term. Your RV sealant must be painted by a single coat and white to deflect the sunlight properly. Also, for the camper roof coating, your product must include the feature of a liquid form to mark it as the best product for you. It can or cannot be considered as the EPDM rubber and can easily be applied as paint all over the roof of your Rv.

(5). Adhesive:

You can also consider the sealant with the tape making it a lot easier for you to apply on the roof of RV. It must be formulated in such a way that it protects from the harsh wind, shine and all types of weather conditions. Your product can be user – friendly if it allows you to easily remove and install and provides protection for more than a decade which makes it durable. It is important to note that there is some RV sealant available in the market that is clear and is best recommended to paint the RV.

(6). Moisture resistant:

Your product must be versatile so that it can be used on various surfaces. It must be designed in such a way that it stops the cracking making it flexible to use and increases its lifespan so that you can use it for a longer period. It must be portable that it can be easily carried from one place to another according to your wish without causing any damage to your pocket. You must make sure that your product is not only effective but also is available in your budget so that you can afford it easily. Furthermore, it is important to note that you apply the sealant tape in a place where there is air- conditioner or which is sun-proof to prevent the strengthening of the weak spots on the roof of RV. It must be adhesive so that it resists the water leakage and does not get stick to the silicone caulk. Also, your roof coating product must be made up of the acrylic rubber and must be white so that it can protect from the harmful rays of the sun by reflecting it. It must be flexible and must have the ability to get rid of the roof rumble.

FAQs on the Best RV Sealants for 2020

How to apply and remove your RV sealant?

The applying of your RV sealant the roof is very easy and you should note that before using it, the tour must ensure that the surface is clean and dry. You must read the label before applying to resist the crack and seal the sheets especially EPDM sheets properly. Furthermore, you must apply it as you apply paint on the surface. For removing the tape, it depends on the types of sealant you have applied. You can depend on the instruction written on the manual for removing the sealant off the roof of your RV. If your sealant takes much time to get dry hard to allow it to remove, then it is not the best quality and you must change it quickly. Also, it is important to note that you do not apply to the place which is not air-conditioned or sun-proof as it may cause damage to the roof your RV unless it is white and painted as a single coating.

Does your RV sealant work on every material?

Yes, it can work on the other material also, but it may not give the fine result as it gives on the RVs. So, it is important to note that not all the RV sealant cam work on the surface made up of all types of material. Also, the sealants are designed in such a way that it can perfectly work on the material of RVs such as bathroom tub. You may consider the instruction manual inured with your RV sealant to check if it can seal the materials other than the RVs. As it depends on the type of caulk, so you must use the caulk for the other materials.

Is the silicon chalk good to work with?

No, the silicone caulk is not that good as the rubber-coated sealant. You may get attracted to its multipurpose use as in the bathroom tub or any other household appliances but it is not at all flexible. It is very hard and brittle and is adhesive as it does not get stick easily and does not cover the whole crack because of its inflexible character. Although, you can work with it there are more numbers of a disadvantage than its advantage. I’d the situation arises when your camper either twists or moves, it does not get a hold on it. Aldo, it is not water leakage resistant and the moisture can occur underneath the roof of the RV. So, you must opt for the rubber RVs sealant as it is very flexible in behavior and easily gets spread to cover the crack and it is non- permeable to the water.

How long can you use your RV sealant?

The lifespan of the RV sealant depends on the number of times you have to use it. It is common sense that the more you use the sealant the more caulk gets lesser in size. If your RV sealant is branded then you may need it only two times in a year for recaulking. So, that it is not used many times and the caulk remains for you to use for a longer duration. As the caulk gets stick to the surface because of its adhesive nature wherever they are applied so they last long for several years.

How to caulk your RV roof and windows?

The first step is to find the spot where you want to seal it with the water and air so that it would become easy for you and you can quickly do it. Make sure that there is no raining or snowing before you apply the sealant on the roof of your RV. Also, if you are working on the exterior side of the windows then you must be assured that no harsh winds are blowing there. While sealing, you must also consider the different types of vents and window slide-outs. Moreover, you must find the area where you want the caulking to be done. Before applying the caulking, you must make sure that your RV is clean with the water and soap and after that dry with the air. You must look after the cracks and holes on the roof for which you can pull out the caulking gun. After cutting the tube of the caulk, place your RV roof caulk into the gun and apply it on the crack surface.

It is important to keep in mind that you need the exterior caulking for the RV as it can prevent the water from getting entry into the crack and various spaces. Also, the protection from the exterior elements is important such as the moisture, snow, rain and also the insects from causing damage to your vehicle.

How to Caulk an RV to Prevent Leaks?

Video Transcript:

How to Seal Your RV Roof?

Video Transcript:

Final Verdict:

If I am being asked, I would recommend for the Dicor 501LSW-1 Epdm Self-Leveling Lap Sealant as it is painted with a single coat making it easy to deflect the sunlight. With this feature, it cannot strengthen the weak point of the roof of RV. And it can easily contract or expand the metal which helps it in reducing the wear and tear of the RV and thus increasing its lifespan.

The listed RV sealants are the best options for you to seal the roof of your RV. You can choose any of the listed RV sealants according to your budget and wish.

Relevant Articles:

Edmond Clark is a 34-year-old Blogger from California, USA. He is a Certified Market Research Professional (MRP) & a full-time blogger. His aim is to help the consumer to choose the best product from the market. Contact him for any of your queries.

Leave a Comment