Saturday, November 7, 2026 · Customer reviews of US businesses
The Fair Hearing score
Bad
77 reviews
Select a line to read only those reviews.
Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Flex Seal Products is a company specializing in adhesive bonding products, encompassing the Flex Seal, Flex Shot, Flex Tape and Flex Glue products.
Flex Seal (flexsealproducts.com) has 77 customer reviews on The Fair Hearing, with an average rating of 1.6 out of 5.
77 approved reviews, newest moderated first
We had three projects we used Flexseal on: 1. to patch small holes in a dog pool. 2. to patch a leak under our hot tub. 3. to patch a spot on the roof. Flexseal did NOT work one iota for any of these projects! Didn't even slow the leaks down. We used the tape and the spray. It didn't matter. I wish I could get my money back!
By Em P.
I use Flex Seal liquid for my basement a bunch of garbage doesn't work I wasted my money
By Pete D.
Tried TWICE! Both times product had never been opened but was hard as a rock. Expensive stuff was worthless. Shameful - FlexCrap and Lowe’s in Germantown Tn
By David E.
I use flex seal as instructed. Clean dry surface. Application time between coats. Proper cure time. I used flex seal on my filter basket in my hot tub. Waited a week to make sure it was cured completely. Have you used my hot tub a week now and the flex seal has turned into a soft liquid garbage! My hot tub did not leak at first but now it does again! Thank you Phil Swift! You didn't make a boat out of the damn stuff and leave it in the dark for overnight. Very misleading! Phil
By Phil V.
Didn't know you can't paint over this until after I applied to cracks on my outside stucco walls. Had to use a rotary steel brush to remove it's so I could paint. Wasted money and not for use in areas that you have to paint over it
By Michael L.
Well just bought a gallon $111.00 of liquid Flex seal to seal my cellar cinder block wall. It sucks as most of what I used ended up on my floor. Now I can't paint over it with concrete water proof paint. Thanks Flex seal.
By customer
The FLEX SEAL LIQUID ONLY COME IN THREE COLORS AND CANNOT BE PAITED OVER ONCE APPLIED - I is a total waste of money and costly !!
By Donald K.
Flex seal is not easy to apply. I bought the small tub container. After use I sealed it up as instructions started. It dried out and was hard as a rock when I went to use again. The ads are extremely false about this produce. For the price you would think it would last longer than one use before drying out and become rock hard and useless. I feel ripped off to say the least.
By Yvonne W.
