About Flex Seal

Designed by Phil Swift and a product of Swift Response, LLC, Flex Seal is an aerosol spray containing a liquid rubber sealant that promises to seep into cracks, and to prevent leakage. The makers of Flex Seal claim that it will last for years without cracking, peeling, or losing any of its sealing properties, whether from summer heat or winter cold.

See Also: Beware: Not Following These 6 Tips Could Cost You Money on Your Next “As Seen on TV” Purchase

The company claims that Flex Seal can be used on gutters, roofs, pipes, window trim, cement driveways, AC drip pans, ductwork, and more, though it is not intended to protect against extreme wind or water pressure. As with most “As Seen on TV” products, Flex Seal comes with a 100% satisfaction guarantee.

How Flex Seal Works

Before using Flex Seal, you should shake the can well, clean and dry your surface, and spray in smooth, sweeping motions approximately 12-14 inches from the contact point. The company recommends that several thin coats be applied to an area larger than where the leak occurred, and that temperatures should be higher than 60°F.

When you’re ready to apply Flex Seal, simply press gently on the nozzle, at which point a thick, rubberized liquid will shoot out, which will seep into cracks and holes. Over the course of 24 hours, depending on temperature, humidity, and thickness, this liquid will dry and become a watertight, flexible coating on just about any surface, which will continue to strengthen over time. After using Flex Seal, the can should be inverted and sprayed in order to clear the nozzle.

Flex Seal comes in three color versions: Original black formula, the light “Brite” color, and the new clear version. While all three versions can be painted over after drying, the clear version has a slightly modified formula, which may require additional applications is order to get the job done.

Flex Seal Pricing, Shipping, & Return Policy

One large can of Flex Seal currently costs $19.99, plus $9.95 shipping and handling. Along with your order, you’ll also receive a second large can as an added bonus, though you’ll need to pay an addition $9.95 for “shipping and handling,” which is where many of these “As Seen on TV” products really make their money. After ordering, your shipment should arrive within 2-4 weeks.

If you’re unhappy with Flex Seal for any reason, you’ll have up to 30 days to return the unused portion, minus shipping and handling costs. To initiate a refund, simply call 800-307-6201 to obtain an RMA. Once the product is received and inspected, your credit card will be quickly refunded.

Pros:

  • Rubberized coating claims to seal any leak, crack, or hole.
  • Fairly inexpensive when compared to other major solutions.
  • Portable, easy to use, and not messy.
  • Dries in 24 hours.

Cons:

  • Flex Seal is an “As Seen on TV” product, which often do not live up to your initial expecations.
  • Numerous complaints that the coating breaks off and peels after a very short period of time, or that it doesn’t work as promised. Some have even claimed to have used two cans and still experienced leakage.
  • Similar solutions can be purchased at your local hardware store for as little as $5, without hassles or shipping and handling charges.

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40 Consumer Reviews for Flex Seal

Average Consumer Rating: 1.6
Rating Snapshot:
5 star: 3 4 star: 2 3 star: 0 2 star: 5 1 star:  30
Bottom Line: 18% would recommend it to a friend
Showing 1-11 of 40
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  • 1 out 1 people found this review helpful

    Very disappointed

    • Florida,
    • Jul 13, 2018
    • Verified Reviewer

    We have a drippy gutter over our pool pavers. My husband tried Flex Seal spray and tape. Neither worked AT ALL. My neighbor had the same problem and tried both products as well with the same results - neither product worked. We both came up with the same solution - a small wastebasket under the drip to catch the rain.

    Bottom Line: No, I would not recommend this to a friend

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  • False advertisement

    • Texas,
    • Jul 6, 2018
    • Verified Reviewer

    We purchased $100 worth to seal up our water leaks in our bathroom. It only worked for three days and the water leaks got worst. Would I recommend this product to anyone? Not a chance. The advertisement is false. As far as, As Seen on TV, it is complete BS. I have seen it in our Walmart and Target stores.

    Bottom Line: No, I would not recommend this to a friend

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  • 3 out 5 people found this review helpful

    Product is trash!

    • Syracuse, NY,
    • Jun 28, 2018
    • Verified Reviewer

    This product is complete garbage. I tried using it on my air mattress (just moved into a new place with a boyfriend, I’m 8 1/2 months pregnant) and the mattress had a few holes in it. So we used it in our room with a giant window opener and a couple of fans going to air it out. Of course, it’s going to smell the first few hours, maybe a day after, but I never expected it to be almost four days of this horrific chemical smell It just will not go away. And to make it worse, it didn’t even work! I contacted customer support and asked how to get this awful smell to leave and no reply. Screw this product, I want my money back.

    Bottom Line: No, I would not recommend this to a friend

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  • 4 out 4 people found this review helpful

    Just OK - had leaks after first rain

    • Winter Garden, FL,
    • Jun 23, 2018
    • Verified Reviewer

    I bought four cans of the Flex Shot clear to put in the cracks between my patio aluminum roof. It had been a couple of years since I used some flexible sealant, but I had a couple of drip leaks, so I decided to try Flex Shot after seeing the commercials.

    I scraped off and cleaned the old flexible sealant and made sure to completely cover the linear gaps (about 1/8") between the aluminum roof pieces (about 100' linear feet). I checked after applying to each crack to make sure I had completely covered the gap. About 6 hours later, we had a short rain (drizzle), and I noticed there were a couple of drip leaks. I would not have spent about $50 on four of these Flex Shot cans just to have the same result as old flexible caulk sealant. I now plan to use some aluminum adhesive roofing tape to see if I can stop these leaks since the Flex Shot was not sufficient; it did not work near as well as the caulk I used in the past (it lasted a couple of years prior to drip leaks).

    Flex Shot might be good for other applications, but not for 1/8" gaps between aluminum roofing pieces (the pieces flex with the hot and cold of the day), that is why I had used flexible caulk in the past which is a lot less expensive than Flex Shot and for this application worked a lot better with no leaks for a long time. I suggest not using Flex Shot on patio roofs.

    Bottom Line: No, I would not recommend this to a friend

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  • 6 out 8 people found this review helpful

    It doesn't work on anything

    I tried this product on three different occasions; one on plastic, two on rubber, and three on porcelain. It was bull on all three. Somebody needs to stop Phil Swift from selling a swift one. Very unsatisfied.

    Bottom Line: No, I would not recommend this to a friend

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  • 12 out 13 people found this review helpful

    Very bad

    I NEVER write a review, however, I must say, what a total RIPOFF! This is a TOTAL waste of money.

    I purchased and tried it and it WOULD NOT even hold up a little 1-ounce piece for a model I was working on, so I finally went to a hot glue gun.

    Bottom Line: No, I would not recommend this to a friend

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  • 14 out 16 people found this review helpful

    Flex Seal is a joke

    • Kentucky,
    • Jan 24, 2018
    • Verified Reviewer

    I just bought the Flex Tape to see if it would stop a couple of pinhole leaks. Yeah right, what a joke and waste of my time and money. It does not work. The water pushes out of the sides as it builds up. I'm very disappointed. And they use this in the commercial where they cut a boat in half then put it back with Flex Tape. Yeah right, how misleading to the consumer. I would love for Mr. Flex Seal to get hold of me.

    Bottom Line: No, I would not recommend this to a friend

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  • 18 out 21 people found this review helpful

    Flex Seal Tape and Flex Seal Silicone.

    I had an emergency with a broken pipe so I ran to Walmart and got both. I ran back home and both products failed. I have never been so disappointed in a product. Between the both, I spent $28.00. The tape did not stick. Very sad to say I hate this product.

    Bottom Line: No, I would not recommend this to a friend

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  • 19 out 20 people found this review helpful

    Doesn't stick to or over DRYLOK waterproofing

    It doesn't stick to or over DRYLOK waterproofing on a basement wall. Five feet for $13.00 plus tax and not sticking very well was disappointing. It may work for another application, but I wouldn't recommend using it over DRYLOK.

    Bottom Line: No, I would not recommend this to a friend

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  • 21 out 24 people found this review helpful

    Does not work

    • Nevada,
    • Nov 9, 2017
    • Verified Reviewer

    We bought both the Flex Seal tape and the Flex Seal liquid to repair a rubber hose. Neither product worked at all. Water came right through both repairs. I would never recommend this product.

    Bottom Line: No, I would not recommend this to a friend

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  • 8 out 13 people found this review helpful

    Great product, can it be painted?

    I have used the liquid to seal all the seams in my vintage aluminum boat, and it has worked wonderfully. However, I need to paint over it, and I can't seem to get a paint to stick. I have used a spray paint primer and latex based no slip paint. Neither has worked, it just peels off.

    Any ideas on what type of paint I can use?

    Bottom Line: Yes, I would recommend this to a friend

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