Flex Seal Reviews

I tried this on a small leak after cleaning the area really well, and at first it looked like it was going to hold. But by the next day, it was already starting to peel back. it made me wonder if it only looks strong right after you put it on. Maybe other people had better luck, but for me the hold was weak and I wouldn’t buy it again.

I used Flex Seal on a little leak outside and it actually did the job good. The only thing is it got kinda messy and sticky all around where I sprayed it, so def wear gloves if you use it. Still happy with it overall though.

The first can worked well, so I thought I was good to go, well, actually, the next one came out all weird and clumpy. It’s the same product, but I definitely didn’t get the same results. Frustrating when you’re trying to use it quickly

I followed the directions carefully because I didn’t want to risk messing up the project, but this just would not cure. It stayed tacky for days, and I kept waiting instead of moving on because I was worried I’d ruin the surface if I touched it too soon. Maybe other people have better luck with it, but for me it ended up being a waste of time and not something I’d trust for anything important.

I had to send my order back, and the refund did come through in the end, but it took longer than I thought it would. Support was okay and helped out, just not the quickest to respond.

I used this a few years back on a leak and kind of forgot about it, which I guess means it worked. Haven’t had any problems since, so it must be doing its job...

I used Flex Seal on a small outdoor patch and waited the amount of time the instructions said before painting. The sealing part seemed to do its job, so I’ll give the little rascal credit there, but painting over it was way more annoying than I expected.
The paint didn’t go on evenly and ended up looking blotchy. I tried adding a second coat, thinking that would fix it, but nope — the stubborn stuff still had weird shiny spots showing through like it just wanted to be difficult.

Maybe I messed something up, but I thought it would be easier to paint over. It worked for sealing, sure, but if you’re trying to make the area look clean afterward, this stuff can be a real pain in the neck.

I used this on a little leak by my shed and it was super simple!!! I didn’t need any special tools or anything fancy — just cleaned the area a bit and sprayed it on. Went on really easy and I’m happy with how quick the whole thing was!!!

Had a leak and I was ready to panic like the whole house was about to float away. Used this and it sealed it up well. Such a relief, seriously

I placed my order sometime last week, or maybe the week before, I don’t remember the exact day. Everything showed up correctly though, with no missing items and no wrong sizes. Shipping wasn’t crazy fast, but it wasn’t bad either. Overall, it was a smooth experience and I got exactly what I ordered.

I tried using this on my painted concrete, and it didn’t stick at all. Like, not even a little. So if you’re hoping it’ll actually do the one thing it’s supposed to do on that surface, prepare to be amazed, in the disappointing way.

It worked fine overall and sealed the area like it was supposed to, but the weird part is the can didn’t cover nearly as much as I thought it would based on the label. I ended up having to buy another one just to finish the job. Maybe I was spraying it on too heavy, I’m not totally sure, but I just wish it stretched a little farther

I had a small leak under my sink that was starting to get annoying, so I decided to give this a try. i wasn’t expecting much, but it worked and stopped the leak. Happy with it so far.

I got this for my leaks, and so far it’s been working well for me. I’m happy with it and haven’t had any issues yet.

I used Flex Seal on this little crack outside that gets blasted by the sun for most of the day. It’s been a few months now, and so far it’s still doing its job. Didn’t get all chalky and crumbly like some other stuff I’ve messed with before.
I’m giving it 4 stars because one little area looks kind of faded, not terrible, just noticeable if you’re looking at it. But the crack is still sealed, so I can’t really complain too much. For being out in the UV and heat all day, it held up better than I figured it would.

I picked up Flex Seal after seeing the commercials, but I definitely wouldn’t go into it expecting some instant miracle fix. It helped a bit on a small leak I had, but it took multiple coats and still didn’t seal as perfectly as the ads make it look. I’m glad I tested it on something minor first instead of relying on it for a bigger repair. It might be fine for tiny fixes, but the marketing feels exaggerated.

I reached out to support expecting a fairly quick response, but it took days before anyone got back to me. At first I was just trying to get a simple answer, but after waiting that long with no update, it felt like I had no choice but to escalate the complaint. Frustrating experience overall.

I tried using Flex Seal for a quick fix, but wow, it took forever to dry. Forever. It stayed tacky for hours, so I couldn’t finish the job the way I planned. I followed the directions and everything, but even the next day it still didn’t feel fully ready. Frustrating when you buy something expecting it to be quick and easy. I wouldn’t use it again if I needed something done fast.

I used Flex Seal to patch up a small leak and it did what I needed it to do, but wow, the smell was stronger than I expected. I had to leave the windows open for a while to air things out. It’s not a bad product, I just probably wouldn’t use it inside again unless I didn’t have another option

It seemed to work for about a day, but then the water started coming through again. Based on my experience, I wouldn’t count on this to hold up for leaks for very long