How to Easily Repair RV Roof Leaks with Flex Seal

Leaks in the roof are one of the most prevalent difficulties that RV owners must deal with.If you inspect your roof on a routine basis, you will increase the likelihood of discovering and addressing any …

Repairing roof leak with flex seal
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flex seal spray

Leaks in the roof are one of the most prevalent difficulties that RV owners must deal with.If you inspect your roof on a routine basis, you will increase the likelihood of discovering and addressing any minor issues with it before they develop into significant issues.

A simple leak can occasionally be traced back to the source of various problems, including corrosion, mold, and major damage to the interior.

Best Flex Seal for RV Roof to Repair Leaks

Even though there is no such thing as an RV roof that will endure forever, regular maintenance is vital to ensure its lifespan. You can help extend the life of your RV roof and keep it going strong by doing routine inspections and utilizing the power of The Flex Seal Family of Products. This will allow you to continue to enjoy the great outdoors.

Flex Seal for RV roofs can be purchased in a liquid, a spray, or a shot form. These are the three different formulations available. The liquid and spray version of Flex Seal is available in black, white, and straightforward. In addition, both white and clear variations of Flex Shot are available. The fantastic thing about Flex Seal is that it is compatible with virtually every RV roof material.

Flex Seal Liquid

The fastest way to stop leaks is with Flex Seal Liquid, liquid rubber packaged in a can. Corrosion will be prevented on the roof surface of your RV by using Flex Seal. In addition, it is resistant to melting, peeling, and cracking even when exposed to severe weather. Flex Seal is a thick liquid that may be rolled, dipped, brushed, or poured over surfaces. Its incredible versatility makes it one of the most valuable products on the market. When it is done curing, you will have a layer of rubber that is impervious to water and is both durable and flexible.

Shot of Flex

The Flex Shot is the ideal tool for use in areas that are congested and difficult to access. It works wonderfully as caulking around windows or air conditioners, among other things. It is simple to operate, and as you let go of the downward pressure on the bottle, the liquid will immediately stop flowing out of it.

Tape With a Flexible Seal

A roof section leaking can have Flex Seal Tape applied to it before one of the other flex seal solutions outlined above is utilized. For instance, the tape would work wonderfully to repair a tear in your roof that was brought about by a collision with a tree branch.

There have been a lot of people who have utilized Flex Seal for RV roofs to fix leaks. However, reading through RV community forums makes it very evident that some people are delighted with the outcomes.

Things to Consider Before Getting Started

Before beginning any repair, here are a few things to bear in mind:

  • Before beginning, ensure you have read all the instructions and safety warnings that come with these goods.
  • When necessary, ensure you use appropriate safety equipment such as gloves and eye protection.
  • Cover the sections you do not want to be coated with painter’s tape, carefully considering moving parts such as hinges and other components.

How to Use Flex Seals to Repair RV Roof Leaks

Do you need some help getting started? The following steps are surely going to help:

1. Conduct a Roof Inspection on Your Recreational Vehicle

When it comes to the upkeep and repair of an RV, the roof should always be thoroughly inspected on a consistent and routine basis. When you are performing an inspection of your roof, search for any regions that have cracks, areas that are becoming thinner, or worn spots. In addition, be careful to inspect the condition of any sealants or caulk that are on the roof, as well as those that are located around any vents, doors, skylights, roof seams, and moldings.

2. Get the Areas Ready for Resealing by Preparing them

Before sealing your RV roof, you should wash the area you’ll be working on with soap and water to ensure that it is clean and free of any dirt, debris, or residue. Only then should you begin sealing your RV roof. This step cannot be skipped.

3. Make Sure You Use the Appropriate RV Roof Sealant for the Task at Hand

You can proceed with sealing your RV roof now that it has been thoroughly cleaned. However, no one solution will work for everyone when it comes to RV roof leaks.

This is something that needs to be kept in mind before we get started. Every leak is different, and the type of repair required will depend on factors such as its size and location.

Because not all RV roofs are constructed from the same materials, you should always perform a test on a small area before applying a new product and use your best judgment when deciding which product to use for the repair of your RV roof.

Does Flex Seal Work as Well as Dicor Lap Sealant?

Dicor Lap Sealant is another frequently suggested solution for repairing leaks in RV roofs. Dicor Lap Sealant is a self-leveling compound that is put in a bead and will then spread to cover the leak and seal it. This process is repeated until the leak is completely covered. It is generally agreed upon that Dicor Lap Sealant is a superior product that functions admirably.

The disadvantage of using Dicor Lap Sealant is that it calls for meticulous preparation work and specific temperature conditions to properly level and seal. While traveling in the Alaskan wilderness or the deserts of the Southwest during an emergency repair, it is probable that these preparatory steps and the appropriate temperature conditions will not always be possible or accessible.

Flex Seal Alternatives

Here are four efficient alternatives to the Flex Seal product, which may be out of your price range or difficult to locate in local retailers.

  • Rain Guard Water Wood Sealer
  • Liquid Rubber RV Roof Coating
  • Rust-Oleum Leak Seal Flexible Rubber Sealant
  • Liquid Rubber Waterproof Sealant


It is possible that using Flex Seal as a long-term fix for a leaking RV roof is not the best course of action. For example, one may make the case that Flex Seal was not intended to be used for repairing RV roofs. On the other hand, it seems that the majority of people who gave Flex Seal a bad rating did so because they expected it to be a long-term solution.

Additionally, Flex Seal is available at a reasonable price. You can use it in a variety of climates and conditions, including on dry surfaces, surfaces that are damp, surfaces that are cold, and surfaces that are hot. It effectively prevents leaks and will, without a doubt, buy you some time during which you may investigate more long-term solutions for repairing your RV’s roof.

Frequently Asked Questions

What Temperatures Are Suitable for Using Flex Tape?

Surface temperatures of 20°F to 120°F are ideal for applying Flex Tape.

How Much Pressure Can It Withstand at One Time?

Flex Tape may tolerate a range of pressures depending on the substrate and the circumstances under which it is applied. Therefore, it’s preferable to start by testing a small region.

What Is the Flex Seal Liquid’s Shelf Life?

When properly stored, Flex Seal Liquid has a 24-month shelf life.

How Long Does Drying Take?

The thickness of the coating, temperature, and humidity all affect how quickly something dries. Typically, Flex Seal dries to the touch in 2 to 3 hours and cures completely in 24 hours. Over time, it will grow stronger.

Can I Use It to Seal the Interior of a Tank That Holds Drinking Water?

Flex Seal is not something we advise using on surfaces that will come into touch with drinking water.

How Long Will It Go on for?

Many individuals have discovered that Flex Seal will last for years without cracking, peeling, or losing any of its strength or sealing properties, depending on the environment, added coatings, and upkeep.

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