Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge

I was honestly skeptical about Flex Seal Paste at first. I had a decent-sized hole in the side of my pool while it was still full of water, and I didn’t really expect anything to fix that without draining it. But I gave this a shot—and to my surprise, it sealed the hole tight!It went on thick, stuck well even underwater, and didn’t peel off or loosen. It’s been holding strong for weeks now. I wasn’t sure it would work in that kind of situation, but it definitely proved me wrong. If you’re on the fence like I was, it’s worth trying. and don’t doubt its looks trust in yourself

What a great product. I have a small retaining wall that holds back sand. After a rain it shifted a bit. I repaired it and then sealed it with this flex seal paste. Perfect!

I ordered 3 of the metal cans after reading reviews about the plastic containers arriving sealed but with the contents already cured solid anyway. I was sent 1 metal and 2 plastic containers, so not what I was led to believe I was buying and sure enough the first one I opened was rock solid. Could barely stick a knife halfway in it. I returned all 3 because I wasn't going to risk not getting refunded. This stuff is too expensive to just say oh well and throw away.

Product worked very well. Good amount of workable time, spreads well with a small spackling knife.The only complaint is that the product arrived with the top 1/8" dried up and unusable, and since you don't get that much in the can, having to throw away about 2 spoons full is a real problem. They need to seal the can lid better.

Used it to fill in around, and cover; previously tar-filled expansion joints on a concrete driveway. It went on relatively smoothly until exposure to air began setting the contents while working with it and it became relatively lumpy and difficult to continue applying. I may brush the liquid over the paste later in a concerted effort to smooth the application? I may also try to smooth it with a wire wheel on my Ryobi string trimmer?

Amazon's web page shows the "NEW! Stay Fresh Container", but they shipped the old obsolete plastic tub. As many of the other reviewers have correctly stated, the plastic tub cannot keep the product soft, pliable and usable. I called the FlexSeal factory, and they are fully aware of the problem. If you order from the FlexSeal website, the factory is shipping the Stay Fresh can as of 2024, March 12.This is a good product, but it's a complete waste of money to buy it in the obsolete plastic tub. That form of packaging is incapable of keeping the product in usable form. It hardens from the top down. I bought two from local stores, and learned that if you squeeze the tub at the top and it doesn't feel soft, the product has hardened and won't be usable. Typically it will be softer near the bottom, but all of the product above (the unsqueezable part) is so hard you can't get it onto the putty knife. Amazon needs to stop shipping the product in the obsolete plastic tub.Update: I called Amazon Customer Service and advised them that the plastic tub packaging is obsolete and no longer being shipped by the factory, and that they should return all product in the plastic tubs, and ship only the product (in the can) shown on the web page. I was advised that they would do so. That was on March 16, the same day I ordered the new (can) packaging directly from the factory. It arrives today (March 20). Shipping was free. Looking forward to seeing how it performs in patching a stucco parapet wall.Update: I received the can from the factory. The product was fresh and easy to apply. Because I was applying it on stucco, it took more to fill all the nooks and crannies than I expected, so I will need another can to finish the job. I ended up doing the whole job with a putty knife. I applied it in full sunlight on a warm breezy day, but it stayed flexible enough to work it into a smooth surface as I went. I doubt it will need a second coat. I don't know how long it will last, but I expect it will be pretty durable. There is no way any rain is going to get through the FlexPaste. I used a rubber spatula to scrape all the product from the sides and bottom of the can. Clean-up was easy; I just wiped the material off the tools with paper towels.

Why did you pick this product vs others?:I had a couple of small leaks in my basement where the block wall meets the floor. Not a lot of water but just a trickle when there were heavy rains. I applied it to the trouble areas and since then no leaks at all. Very happy!

I like flex seal. It just doesn't have a real long shelf life and should only be purchased when you know you are going to need to use it.