Flex Seal Power Putty Moldable Waterproof Rubber Sealant, Fills Cracks & Holes, Gray, 16 oz

[This review was collected as part of a promotion.] This worked great for a repair on my saltwater fish tank. It was easy to use, molded exactly where I needed it to, and made a good seal when it cured. I appreciate products like these because you never know when you're going to need it. It's still holding up without issues.

[This review was collected as part of a promotion.] This putty works so well. I used it under my sink on the seams for the pipes. I had a leak. We put some of this on, and no more leak. It has been a month, and no leaks, and no reapplication needed. I highly recommend.

It is strong and seals and stops leaks. Good product!!

[This review was collected as part of a promotion.] Flex Seal Power Putty is one of those products that earns its keep when something goes wrong and you need a fast, reliable fix. It's easy to work with right out of the package—no mixing, no complicated prep—and it molds well by hand so you can press it into cracks, gaps, or broken areas without a mess. Once it sets, it hardens into a tough, durable patch that actually holds up under pressure. It sticks well to a variety of surfaces like metal, wood, concrete, and PVC, which makes it useful for both indoor and outdoor repairs. It's especially handy for quick plumbing fixes, sealing leaks, or patching unexpected damage when you don't have time for a full repair job. What stands out most is how simple it is. You don't need to be a DIY expert to get solid results. It's not a permanent replacement for a proper repair in every situation, but as a strong, dependable “fix it now” solution, it performs exactly the way you hope it will.

[This review was collected as part of a promotion.] My hot tub developed a leak and I couldn't figure out how to stop it without doing something very invasive. FlexSeal solved that problem for me, at least temporarily, and has made it possible for us to use our tub during this summer weather. It's easy to apply and works very quickly.

[This review was collected as part of a promotion.] The Flex Seal Power Putty was easy to apply and had a smooth, workable consistency that made filling gaps and cracks simple. It has very little odor & dries into a durable finish. Great product to keep on hand for quick household fixes.

[This review was collected as part of a promotion.] Not very flexible to form once it's on the place you want, however it's durable and sealed our area that the caulk was removed from the area in the bathroom! No scent or anything, no residue left on fingers when used. Decent stuff!

[This review was collected as part of a promotion.] Strong and reliable quick fix solution for small repairs. It's easy to mold, sets fast and creates a durable waterproof seal once cured. Great for fixing leaks, cracks or broken items around the house.

[This review was collected as part of a promotion.] We used this power putty to seal some cracks in our window sill. It works pretty well but we will need to give it more time to see how long it holds up. Overall I would say so far so good. For some reason the app wouldn't allow me to upload the photos.

small hole in a well pipe and this didn't stop anything. The commercial on tv shows it stpping a massive flow of water. Huh. Too good to be true, just doesn't work