How Long Does Flex Seal Last on Average?

Did you get your hands on one of the iconic Flex Seal buckets - and wonder how long it even lasts? I've got ALL the answers you're looing for!

I love watching the Flex Seal commercials. It is totally amazing to watch the flex seal inventor patch holes in crazy things like a boat in a lake or a giant tank of water with a crack. 

It almost seems like the product is too good to be true, but it is really a great product that has plenty of applications for camping.

Flex Seal is a liquid rubber product that creates a tough yet flexible, water-tight seal or surface. It comes in a variety of formulations including spray-on, paint, pourable, caulk, and even tape. 

This amazing product is also UV-resistant, non-flammable, and non-toxic so it is safe for your kids and pets to contact.

One of the things that we have found that Flex Seal is great for, is making repairs on our camper. Because of its durability, water-tight seal, and UV-resistance, it is perfect for fixing leaks, cracks, and gaps on your camper.

One question that we were curious about, as we started using Flex Seal, is how long does it last? 

Could we expect it to hold tight and work well for an extended time, or is it a product that is designed for a temporary fix only?

How long does Flex Seal last?

Well, this depends on the Flex Seal product that you use, and the environment that it is exposed to. The traditional Flex Seal product and the tape seems to hold well for a number of years. It seems to also resist cracking or peeling for many years as well.

Flex Shot, the spray-on product has a 30-year life, depending on the environment. This means that it will continue to hold tight and will not crack, dry, fade or turn yellow for at least 30 years.

You heard me… 30 years!

Can I use Flex Seal on my camper roof?

Camper roofs are prone to leaks. Likely this is a combination between the lightweight construction and the wear and tear your camper takes riding along behind your vehicle. A leaky camper roof can really put a damper on a vacation.

Flex Seal is a great way to fix leaks on your camper roof. Use the liquid sealer to fill cracks in the roof. The Flex Seal caulk can be used to reseal around skylights, vents, fans and other features on the roof of your camper.

Because Flex Seal is UV-resistant it’s a great option for the top of your camper, because it won’t break down like other types of caulk or silicone sealants.

Now, if you’re interested in doing more than just fixing a few spots here and there, you can invest in a larger quantity of the Flex Seal liquid and paint the entire roof of your camper with the rubberized product. 

This will close up any leaks that you might not see, and will provide additional UV protection to your camper. This is a slightly pricier option, because it will take at least three coats to get the best protection. 

But, when you’re done your camper roof is well protected, and you shouldn’t have to worry about leaks for many years.

If you’re interested in painting over Flex Seal, I’ve written an entire post on whether or not you can paint over Flex Seal.

Why use Flex Seal on your camper roof?

Here are just a few of the benefits of Flex Seal:

  • Extremely flexible and durable
  • Ideal for stop bars, guardrails, stepped flashings or metal edging
  • Durable and UV resistant; will not crack, crack, chip
  • Maximum seal clearance capacity of ± 25%
  • Adheres to many types of substrates, including metal, copper, concrete, wood, SBS, APP, EPDM, TPO, PVC, as well as multilayer substrates and asphalt shingles
  • Can be painted

How often should the camper roof be resealed?

Sealing the roof of your camper is one of the most important parts of camper maintenance. Each year check the roof of your camper either at the end of the season, or as you’re getting it ready for your first trip of the summer. 

While Flex Seal is really long lasting and durable, it doesn’t hurt to apply a thin coat annually. This will seal any new leaks and improve the water-tight seal and UV-protection for another year.

This is also a good time to check the gaskets around your camper windows, doors, air conditioner and roof vents. If these have started to deteriorate, you can use Flex Seal caulk to fill the gaps and keep these features from leaking as well.

What is the shelf life of Flex Seal liquid?

Flex Seal liquid, when stored in the proper conditions has an anticipated shelf life of around 2 years. To get the most shelf life from your flex seal, make sure that it is stored in a place that doesn’t get too hot or cold, and that the lid is on tight. 

If the lid is not properly closed, a layer of “skin” may form over the top of the product. If this happens, the skin can be pulled off, and the liquid product underneath can still be used.

Later, skater!

A leaky camper roof can spoil the best of vacations. However, roof leaks are unfortunately one of those things that all camper owners will deal with at some point. 

Our favorite product to stop leaks on our camper roof is Flex Seal. Flex Seal is the most durable and easy to apply product on the market today, and it comes in a variety of application methods, from a spray can, brush-on or roll-on paint and even a handy roll of tape. 

Keep some Flex Seal in your camper for sealing leaks on the go, and then use it at the end of the season to coat your camper roof to protect against leaks all winter long.

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Jason Gass

When I'm not working, I spend most of my time camping, hiking, and road-tripping with my wife, my daughter, and my two dogs.