website thubmnail of Flex Seal
How would you rate Flex Seal?
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California
1 review
1 helpful vote
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Flex zhit
September 3, 2020

This crap does not work. Used it on my shop to prevent water leakage and guess what? It's still leaking.

Date of experience: September 3, 2020
Florida
1 review
0 helpful votes
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I had a flat roof sunroom addition added to my home over a decade ago. Everything was great for several years, then the roof started leaking. I had three different roofing contractors over a period of 5 years come to solve the leaking. I spent thousands of dollars with the different contractors. I always thought the problem was the fact that the flat roof was installed under the main roof and it was not done correctly. I had seen the advertisements for the flex seal spray. I watched the product line grow and continue to use buckets to catch the leaking. I live in central Florida. The leaking would always start after heavy rains. After my frustration reached its peak I finally went up on the roof to see if what I thought was true. Prior to going on the roof I had decided I would try the flex seal products. My inspection revealed tiny slits in the roofing seals. I also own a 2013 forty-five foot RV and was familiar with flat roof problems. After seeing for myself the issue I went out to purchase flex seal products. I purchase the tape, spray and roll sealant spending around $90 total. I cleaned the roof so I could see the small slits. I applied the spray and noticed that is would seep into the slits and then reopen. I continued to use the spray until the seeping stopped. I then applied the tape like a patch making sure all air bubbles were removed. Finally I applied the roll-on flex seal making sure the edges around the patch were covered. The roof covering was white so I use the white roll-on to finish the job. I took my time making the final application look professional. No more leaking since my DIY repair. I will use a $100 solution over a multiple thousand dollar repair anytime. The products worked for me when correctly applied.

Date of experience: June 1, 2023
Canada
1 review
0 helpful votes
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Eavestrough repair.
January 11, 2022

Bought the flex seal spray and tape to try and repair some pinhole leaks in some eavestroughs. No good

Date of experience: January 11, 2022
Michigan
1 review
6 helpful votes
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Can't review because they won't or can't send my order. I finally cancelled. I now use DAP products.
Bootss

Date of experience: June 28, 2020
Oklahoma
1 review
12 helpful votes
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Worst product ever
July 15, 2019

Tried Flex seal tape, liquid and sealant on swimming pool. None of them work. Liquid peeled offf inside pool. Tape never stuck.

Date of experience: July 15, 2019
Florida
1 review
0 helpful votes
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Sad
June 10, 2021

Tried to fix a leak in a irragation system and gutter, on the way to lowes to find something else that works

Date of experience: June 10, 2021
Texas
1 review
0 helpful votes
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Flex seal is the truth.
November 4, 2021

I rolled it on the top of my enclosed trailer and it stopped all the leaks. The spray wasn't so good but the canned stuff is the truth.

Date of experience: November 3, 2021
California
1 review
5 helpful votes
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Horrible company to deal with. Ordered on May 19th. Still waiting on June 8th for my order. Numerous E-mails sent to company. Not one response back.

Date of experience: June 8, 2020
Maryland
1 review
28 helpful votes
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Doubled the order (unauthorized) and charged $9.95 per can shipping/handling which came to $59.70 OUTRAGEOUS! Wikll never buy from them aqgain. Total bill was $119.67 BOUGHT BECAUSE OF TV OFFER.

Date of experience: August 25, 2011
Canada
1 review
0 helpful votes
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Applied 3 light coat.let dry 24 hours between...white colour was a good match...saved me lots of $

Date of experience: March 6, 2023
Canada
1 review
2 helpful votes
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Travis Scott
February 19, 2021

Travis Scott

This product is life and Phil swift is god and Im worshipping this I love it so much more then my own family

Date of experience: February 18, 2021
New York
2 reviews
1 helpful vote
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Flesh Seap spray
June 19, 2023

IT IS PURE GARBAGE SOLD BY MAJOR RETAILERS BY A SNAKE OIL SALESMAN. DO WASTE YOUR MONEY. THEIR AD IS AS DECEPTIVE AS A HAVE EVER SEEN.

Date of experience: June 19, 2023
New York
1 review
24 helpful votes
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Does not work
November 18, 2015

I bought 7 cans $13.00 each sprayed different time coats my enclosed porch STILL leaks! Dma

Date of experience: November 18, 2015
Canada
1 review
0 helpful votes
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Absolutely useless
April 22, 2025

I bought the white flex seal glue and flex tape. The white product isn't even sticky. More like a combination of flour and water. Wipes off with a tissue. Certainly doesn't "bond instantly," but rather never bonds at all. The tape is impossible to work with. It will stick to your cutting implements and your fingernails and then the glue pulls off the tape but it will not stick to the item you want to repair. Would never buy again

Date of experience: April 22, 2025

Overview

Flex Seal has a rating of 1.3 stars from 219 reviews, indicating that most customers are generally dissatisfied with their purchases. Reviewers dissatisfied with Flex Seal most frequently mention customer service, small leak and credit card. Flex Seal ranks 256th among Plumbing sites.

service
42
value
74
shipping
32
returns
31
quality
70
+56