Flex Paste Super Thick Rubber Paste, 8.75 fl oz, White

We've had an on-going problem with our 20 year old fiberglass/gelcoat shower/tub. The leak started as a small hairline crack in the bottom and has grown to 2-3". Over the last 3 years I've patched it twice with the Gelcoat Repair Kits which last a while, but begin leaking again. I did some research and decided to give Flex Paste a try. I covered the leaking area with Flex Paste and have been leak free for a couple of weeks. It seems like a solid repair and we'll see how long it lasts. I like that I can spread the Flex Paste well beyond the crack.

I had to cover up a couple of cracks so water wouldn't leak in and the flex tape helped keep the water out, it's a great quick fix. I suggest getting a putty scraper that's narrow enough to fit into the tub. Apply a thick enough coat, let it dry fully for a full day. Go over it the next day just for extra coverage. You have to read the directions and keep the foil on it and silica gel packets so the entire tub doesn't dry out. This is very important. It's a good price and I had some left over just in case I need it in the future. I recommend it!

I bought both Flex Seal spray and Flex Paste at the same time. The Flex Seal spray worked great, and turning the can upside down and spraying until it clears after each use allowed me to use the spray, a little at a time, over a 2 week period without any clogging. The Flex Paste came with about an inch thick ring of the paste hardened at the top. Using the suggestions of leaving the remaining paste level and resealing with the protective foil and silica pack allowed me to use a little at a time over a two week period without any further hardening or waste. Luckily I didn't need that amount that was hardened when it was delivered. But yeah, it worked great layering it on every other day, allowing each layer to dry between coats.

So far I went through 3 tubs out of 4. In each tub, when I lifted out the foil "seal" there was a ring of dried and hardened paste all around the edge which I had to dig out. Seems like the seal did not seal very well,or the product sat around too long. Also I sure wish the paste was a little softer and easier to spread and work with.

It works as described to use under water . But I warn anyone trying to use this product in their Koi fish pond.. Do not use! I attempted to use this to stop a leaky water skimmer. Although, so far my fish seem unharmed, Flex Paste leaves a large oily film on top of the water. It is virtually impossible to get rid of without fully draining and washing your pond out.

It's a great product, BUT, unless flexseal finds a better a better way to package their product expect to lose 1/3 . The top one third of every tub has already solidified when you open it. In essence you're paying for 2/3 of whatever is marked on the tub. I've got a bunch of solid donuts from each tub if anybody wants them. THAT ALUMINUM FOIL ON TOP IS NOT DOING THE JOB.

Seal membrane inside bucket only contacted product on 2inches diameter out of 4 5/8” diameter bucket. Made about 10-20% of bucket unusable because it had hardened into an inch plus thick donut. Tried to patch a crack in wet tar on roof and paste wouldn't stick just rolled up onto other side of putty knife. Worked good on A/C hole in window.

When I first opened the container, the paste was already cured around the edges. Used some and sealed it as directed for future use. When opened, the remaining product was solid. Very disappointed.

it's not no good it's hard and it has never been open until today was going to use it on repairing of a door on the house I'm trying to sell and it's hard it won't come out

totally failed to live up to what was advertised. i was trying to seal cracks in a fiberglas tub. it didn't stick, just slid across surface as i tried to spread. spent a lot of money on a total failure. i fixed the problems by using epoxy and fiberglas tape.