Top RV Roof Sealants | Protect Your RV Investment

Table of Contents

When it comes to maintaining your RV, one of the most important tasks is ensuring that your roof is properly sealed. A leaky roof can cause significant damage to your RV and lead to costly repairs. That’s why it’s crucial to invest in a high-quality RV roof sealant.

But with so many options on the market, how do you know which one is the best for your RV? In this article, we’ll explore the top RV roof sealants and help you choose the right one for your needs

Why Is RV Roof Sealant Important?

Your RV’s roof is constantly exposed to the elements, including harsh UV rays, rain, and extreme temperatures. Over time, this exposure can cause the roof to crack, peel, and develop leaks. A good RV roof sealant acts as a protective barrier, preventing water from seeping into your RV and causing damage.

Protects Against Water Damage

Water damage is one of the most common and costly issues faced by RV owners. A leaky roof can lead to rot, mold, and mildew, which can cause structural damage and health hazards. By using a high-quality RV roof sealant, you can prevent water from seeping into your RV and avoid these issues.

Extends the Life of Your RV

Investing in a good RV roof sealant can also help extend the life of your RV. By protecting your roof from the elements, you can prevent premature wear and tear and avoid costly repairs or replacements.

Maintains the Value of Your RV

A well-maintained RV is more valuable than one that has been neglected. By regularly sealing your RV’s roof, you can keep it in top condition and maintain its value for years to come.

Types of RV Roof Sealants

There are several types of RV roof sealants available, each with its own unique properties and benefits. The most common types are TPO, EPDM, and silicone sealants.

TPO Sealants

TPO (thermoplastic polyolefin) is a popular roofing material used in RVs. TPO sealants are specifically designed for use on TPO roofs and provide excellent adhesion and protection against UV rays. They are also resistant to mold and mildew, making them a great choice for RVs in humid climates.

EPDM Sealants

EPDM (ethylene propylene diene monomer) is another common roofing material used in RVs. EPDM sealants are designed to bond to EPDM roofs and provide excellent protection against UV rays and extreme temperatures. They are also flexible, making them a good choice for RVs that may experience movement while on the road.

Silicone Sealants

Silicone sealants are a popular choice for RV roofs due to their durability and flexibility. They are resistant to UV rays, extreme temperatures, and chemicals, making them a great all-around option for RVs. They also have a longer lifespan compared to other sealants, making them a cost-effective choice in the long run.

Top RV Roof Sealants

Now that you know the different types of RV roof sealants, let’s take a look at some of the best options on the market.

Dicor 501LSW-1 Lap Sealant

The Dicor 501LSW-1 Lap Sealant is a popular choice among RV owners. It is specifically designed for use on RV roofs and provides excellent adhesion to a variety of roofing materials, including TPO and EPDM. It is also UV-stabilized, making it resistant to cracking and peeling.

EternaBond RSW-4-50 RoofSeal Sealant Tape

The EternaBond RSW-4-50 RoofSeal Sealant Tape is a unique option that comes in the form of a tape. This makes it easy to apply and provides a strong, waterproof seal. It is also UV-stable and can withstand extreme temperatures, making it a great choice for all types of RVs.

Geocel 28127V Pro Flex Crystal Clear RV Flexible Sealant

The Geocel 28127V Pro Flex Crystal Clear RV Flexible Sealant is a silicone-based sealant that provides excellent adhesion and flexibility. It is also UV-resistant and can withstand extreme temperatures, making it a great choice for all types of RVs. It is also clear, making it a good option for those who want a more discreet sealant.

Dicor 501LSW-1 Self-Leveling Lap Sealant

Another popular option from Dicor is the 501LSW-1 Self-Leveling Lap Sealant. This sealant is specifically designed for use on horizontal surfaces and provides a watertight seal. It is also UV-stabilized and can be used on a variety of roofing materials, including TPO and EPDM.

What are the Ventilation Requirements for Roofs in Ontario

The following minimum ventilation criteria for rooftops are specified by the Ontario Building Code (OBC):

Total Ventilation Area →The overall ventilation space ought to be a minimum of 1/300 of the area covered by the insulated ceiling.

Distribution → There should be an equal distribution of ventilation holes on both sides of the building, with a minimum of 25% of the openings situated at the top and a minimum of 25% at the bottom of the space.

Type of Vents →Vents might be of the roof, eave, gable-end, or any combination of those types.

Installing further ventilation, such as gable or roof vents, maybe something you want to think about if you are worried about ice dams developing on your roof. In order for water to drain correctly, you need also make sure that your gutters and downspouts are clear of debris and clean.

How to Apply RV Roof Sealant

Applying RV roof sealant is a relatively simple process, but it’s important to follow the manufacturer’s instructions for best results. Here are the general steps for applying RV roof sealant:

  • Clean the roof: Before applying sealant, make sure your roof is clean and free of debris. Use a mild detergent and water to clean the roof, and allow it to dry completely.

  • Prepare the sealant: If using a tube sealant, cut the tip of the nozzle to the desired size. If using a tape sealant, measure and cut the tape to the desired length.

  • Apply the sealant: Apply the sealant in a continuous bead along the edges of the roof, vents, and any other areas that may be prone to leaks. If using a tape sealant, remove the backing and press the tape firmly onto the roof.

  • Smooth the sealant: Use a putty knife or your finger to smooth the sealant and ensure it is evenly distributed.

  • Allow to dry: Depending on the type of sealant used, it may take anywhere from a few hours to a few days to dry completely. Check the manufacturer’s instructions for specific drying times.

Tips for Maintaining Your RV Roof

In addition to regularly sealing your RV’s roof, there are a few other steps you can take to maintain its condition and prevent leaks:

  • Inspect your roof regularly for any signs of damage or wear and tear.

  • Keep your RV covered when not in use to protect it from the elements.

  • Avoid walking on the roof unless necessary, as this can cause damage.

  • Trim any overhanging tree branches that could potentially damage the roof.

  • Check and clean your RV’s gutters regularly to ensure proper drainage.


Investing in a high-quality RV roof sealant is crucial for maintaining the condition and value of your RV. By choosing the right sealant and regularly maintaining your roof, you can prevent costly repairs and extend the life of your RV. Consider the options mentioned in this article and choose the one that best suits your needs. Happy camping!