• Flex Seal

Flex Seal

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Overview

Flex Seal has a rating of 1.5 stars from 214 reviews, indicating that most customers are generally dissatisfied with their purchases. Reviewers complaining about Flex Seal most frequently mention customer service, small leak, and credit card problems. Flex Seal ranks 113th among Plumbing sites.

  • Service
    39
  • Value
    70
  • Shipping
    29
  • Returns
    28
  • Quality
    67
Positive reviews (last 12 months): 11.1%
Positive
3
Neutral
0
Negative
24
52
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What reviewers want you to know

Positive highlights

No positive highlights yet

Critical highlights

  • Flexseal spray was on my basement stairs in a cool dry spot and it released flex seal doing damage to my house.
How would you rate Flex Seal?
Top Positive Review

“Leaking roof of my camper..”

Matthew R.
8/12/23

Excellent product... I live in Florida where it rains slot. I have been living in a camper since my home was destroyed by a Cat 5 Hurricane... The roof of the camper leaked when it rained. I was in Dollar General and spotted a can of Mr. Swift's flex seal and thought why not... I sprayed the entire top of the camper with it and waited for the next storm...When it it hit, it was ferocious! But not a single leak in my little camper... EXCELLENT PRODUCT!

Top Critical Review

“It's a scam didn't work on my rv”

Jim S.
2/10/24

I bought clear flex seal tape at Dollar General for $15.99 put it on seam it wouldn't seal even cleaned area before applying this is a POS product don't waste your money by a lying company and there computer generated reviews Flex Seal Tape Sucks and doesn't stick a waste of hard earned money ml

Reviews (214)

Rating

Timeframe

Other

Reviews that mention popular keywords

flex seal (93)
Thumbnail of user jims2623
1 review
2 helpful votes
February 10th, 2024

I bought clear flex seal tape at Dollar General for $15.99 put it on seam it wouldn't seal even cleaned area before applying this is a POS product don't waste your money by a lying company and there computer generated reviews Flex Seal Tape Sucks and doesn't stick a waste of hard earned money ml

Thumbnail of user kurtm473
1 review
0 helpful votes
February 19th, 2024

Put the tube in my caulk gun. Almost broke my wrist trying to get glue out.
I'll never buy your products again. $16.00 for a tube of trash

Thumbnail of user randalln98
1 review
1 helpful vote
January 15th, 2024

Purchased the tape that is advertised to work underwater. Tried to patch a small leak on the outside of a 40 gallon plastic tank and it would not seal the leak. Used an 8 foot roll trying to make it work. Don't waste your money.

Products used:
Flex tape

Value
Quality
Thumbnail of user rwl5
1 review
1 helpful vote
December 20th, 2023

Not only is this product overpriced, it's totally worthless. After a year, it cracks and leaks. Tried Flex Seal liquid on a roof seam two years in a row, and got the same horrible results. Don't waste your money!

Products used:
Flex Seal Can

Service
Value
Returns
Quality
Thumbnail of user ralphm627
1 review
1 helpful vote
April 3rd, 2023

I've used this product probably 75 times and 74 of the 75 times I was completely satisfied with the product all right one time I found out just how flammable the product was my own fault but it ran me completely out of the product and that caused a bit of grief but otherwise it works as advertised

Products used:
Flex seal

Service
Value
Quality
Thumbnail of user benmenis3
1 review
1 helpful vote
October 11th, 2023

I purchased the Flex Seal White Paste, to fix a rather small leak in the upper part of my 35"X 45" window. After I opened the container, I noticed most of the paste had ALREADY HARDENED INSIDE THE CONTAINER. What was still soft inside the container was very rubbery and quite difficult to "spread evenly" as per the instructions. The result was just a mess. NOTHING LIKE THE ADS FOR THIS STUFF ON TV! These folks outta be sued for false advertising...

Tip for consumers:
I was "suckered in" by the ads on TV. Don't believe the hype...

Products used:
Flex Seal Paste - White

Value
Quality
Thumbnail of user herbg38
1 review
1 helpful vote
October 6th, 2023

I used Flex Seal Liquid over waterproofing cement, 3 coats over two days, min 8 hours between coats, allowed to cure for one week to waterproof my small pond. About two months later, I drained the pond to repair the pump to find that the Flex Seal had failed. It had blistered and was peeling. Seems unsuitable for waterproofing application when submerged under water. Advertising led me to believe otherwise.

Products used:
None

Value
Quality
Thumbnail of user matthewr1329
1 review
0 helpful votes
August 12th, 2023

Excellent product... I live in Florida where it rains slot. I have been living in a camper since my home was destroyed by a Cat 5 Hurricane... The roof of the camper leaked when it rained. I was in Dollar General and spotted a can of Mr. Swift's flex seal and thought why not... I sprayed the entire top of the camper with it and waited for the next storm...When it it hit, it was ferocious! But not a single leak in my little camper... EXCELLENT PRODUCT!

Thumbnail of user aprilbuck8485
1 review
1 helpful vote
October 7th, 2023

I would have been better off using Elmers glue. This product is useless. Very runny when you spray and does not secure a leak. I have used the paste in the past and it does not perform or spread as show on TV.

Thumbnail of user kp383
1 review
2 helpful votes
May 20th, 2022
Verified purchase

4 projects: 1. Leak in a garden hose= Fail. 2. Water trough leak= Pass 3. Swimming pool outer seam=Fail. 4.50 gallon drum lid crack=Pass
I wouldnt use it on anything that "will have" pressure coming towards it or that remains in the sun... unless ya dont mind gett'n yur hair pulled out! :)

Thumbnail of user victoriat720
1 review
8 helpful votes
March 10th, 2023

I have purchased almost all the stupid products advertised by this company. DO NOT WASTE YOUR MONEY! Nothing works!Not even for 5 minutes. They have no guarantees but worse it solves no problems. Leaks still leak and the advertising is outrageous lies. Cant say enough negative remarks about this totally useless product line.No need to send pictures just water leaking all over. They should be reviewed by consumer affairs committee and shut down!

Tip for consumers:
DO NOT ORDER_ IT IS USELESS

Products used:
roof sealer, tape,epoxy and more - over $200 in products.

Value
Shipping
Returns
Quality
Thumbnail of user roberts7752
2 reviews
4 helpful votes
January 18th, 2023

Sprayed flexseal on last August and look at it today. The crap is not sealing anymore, all cracked and disappearing. What a disappointment.

Thumbnail of user bill.a1
1 review
4 helpful votes
July 8th, 2023

Could not seal my 8" pvc irrigation pipe this morning. Tried 3 times, scuffed up the pipe as well and it does not stick under water OR UNDER ANY CIRCUMSTANCE'S as shown in the commercials. The pipe is not fixed and is still leaking. Good thing it was purchased at Walmart as they do take everything back and I will be returning this bogus product today. My duck tape works just fine under an emergency. Do not waste your money.

Products used:
seal tape

Service
Value
Shipping
Returns
Quality
Thumbnail of user scottt1354
1 review
2 helpful votes
July 1st, 2023

The first 3 inches of tape was very good, then after that, the rest of the roll OBVIOUSLY BAD. Masking tape is better. I used it on the exact same type of area on 2 items (cap area on a paintball bunker). The first one was great. I could barely get my fingers off the the tape. THen, 3 inches into the roll, only about 20% of stickiness that the first 3 inches had. FlexSeal cheats on manufacturing. Gives you the real product for your first little strip then cheats on the rest. HORRIBLE.

Thumbnail of user toddl253
1 review
13 helpful votes
June 17th, 2021

Wasted my hard earned money on a product that would take gallons and gallons and gallons in spray form to do a very small amount this product didn't even fill 3/16 inch holes. Don't waste your time and money folks! Great sales pitch for us suckers used a $15 can on this small project and multiple coats with proper time to dry so I don't wanna hear it! Congratulations on yet taking someone else's money with a misleading sales pitch.

Products used:
Flexsael aka worthless spray in a can!

Value
Quality
Thumbnail of user jamesp3574
1 review
9 helpful votes
February 11th, 2022

I bought the 5' roll of clear flex seal tape and was going to fix a small spot on the bottom of my boat and I even cleaned the area really good let it dry overnight applied the tape it looked to be stuck good and seal off put the boat in the water the next day and the tape peeled loose in several places and was leaking glad I caught it when I did would have sunk my boat
In other words I would not waste my money on this product it is misleading that it will fix boats

Service
Value
Shipping
Returns
Thumbnail of user shelleys324
1 review
0 helpful votes
February 16th, 2022

Ive used it on everything from my roof, gutters, concrete statues, paintings, including paintings on glass tables! But if it comes in contact with sidewalk salt, i use the pet safe stuff, it strips it right off! But i sprayed our entire purgla prior to assembly and 4 yrs still going strong

Tip for consumers:
Dont allow it to come in contact with sidewalk salt

Products used:
Clear flexseal spray

Value
Quality
Thumbnail of user johnt4442
1 review
3 helpful votes
May 28th, 2023

I used it on air filled inflatables with a small leak, does not seal hole and months later still wet to the touch and come off in hands and anything it touches. Terrible product, stay away!

Value
Quality
Thumbnail of user dennyl49
1 review
1 helpful vote
April 30th, 2023

I had a small leak in camper roof. I used liquid Flex Seal and covered entire area 3 feet around hole, Looked great. Next year I decided to coat entire roof. Bad idea. 2 years later Flex Seal starting flaking off and roof leaked resulting in major damage. Also roof cannot be coated with anything until all the Flex Seal is removed. Decided to scrap My camper valued at 6000.00

Products used:
None. Roof ruined

Value
Quality
Thumbnail of user tknjfrench
1 review
2 helpful votes
August 21st, 2023
Verified purchase

Opened the container to find a hardened ring of product. Contacted customer service to be told that they overfill the container so there is expected to be some hardening, was told to send a picture and if they thought it was excessive they would address it. Didn't get a response so I guess this is to be expected when buying Flex Seal Paste.

Thumbnail of user peted158
1 review
4 helpful votes
December 8th, 2022

I have used flex seal in the past with no good results. Just used the flex seal tape with even worst results on a simple hose that had a small leak and it still leaked even more. When they show a leak running from a pipe and put tape on and stop. But what I think is they turn the water off. I will let people how bad the product really is. I would post a picture but didn't want to crawl back under the commercial washer.

Products used:
None of of flex seal

Service
Value
Shipping
Returns
Quality
Thumbnail of user joycemicha56
1 review
7 helpful votes
May 27th, 2023

How can any company or person sell bull crap and get away with it. For instance that bullcrap supposed to plug holes in boats yeah right u will drown. I'm so sick of all these fake bull crap. I really hate ppl taking advantage of other ppl for the sake of money. Wow get a real freaking job. Also they know that ppl gonna buy it at least once and just millions of ppl buying it to see if it's legit these greedy as ppl or company already made millions because we trusted what they say. These ppl need to be locked up and throw the freaking key away! So freaking unreal how they can get away with this.

Tip for consumers:
They suck period

Products used:
Flex seal for boats

Thumbnail of user hengamehh
2 reviews
2 helpful votes
April 26th, 2023

These products do not even close a hairline crack. All lies and fraud. Who on earth gave them permit to work and sell this product. Is the government sleep?

Products used:
spray, and tape

Value
Quality
Thumbnail of user carolr617
1 review
36 helpful votes
June 11th, 2020

Have not had the chance to make review. I ordered the Flex Seal paste on May 11,2020. Still no delivery. They have withdrew the money from my bank account. I talked to someone two weeks ago. They said it is on it's way. Apparently it comes from a town 40 mile's away from me. How hard can that be. They are dishonest, I would think twice about ordering online. Sounds like they have poor management.

Thumbnail of user terryb1172
1 review
2 helpful votes
May 11th, 2022

I am a self sufficient small farm guy. Last night i got my sprayer out from a winter storage that was heated. I proceeded to to put a herbicide and water mix in the tank when I noticed fluid running out the end. After accessing found the seam had split about 7" worth. I looked for my flex seal tape but was out. I then remembered I had flex seal caulking so took the Chance that it would hold and not waste more product. It saved the day and I just wanted to say thank you for a product that I feel lives to its name! I also used flex seal tape after welding two connex containers together two years ago and still no leaks. Thanks again
Terry Buchholz
*******@unlimitedinnovationsinc.com

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About the business

Flex Seal is the easy way to coat, seal, and stop leaks fast! Easy to use, portable, aerosol spray. Seeps into cracks and holes. Dries to a watertight, flexible, rubberized coating. Seals out water, lasts for years. Order yours today.

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1.5
214 reviews
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