
Ratings & Reviews for Flex Seal Epoxy Extreme Liquid Multi-Purpose Durable Permanent Watertight Long-Lasting Bond for Automotive Marine Plumbing Home Tool Repairs Cures Black 2 Tubes: 0.5 fl oz (14 mL) Each
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this epoxy for its exceptional bonding strength, fast drying time, and ease of use. Most highlight rapid initial set within minutes and full hardness within hours, enabling immediate handling. Reviewers consistently report extraordinary holding power—describing repairs on metal, wood, ceramic, plastic, and engines as durable and unbreakable. Many commend the simple knead-and-apply process, precise dispensing, and effortless cleanup. The minimal odor and black color that blends seamlessly with repairs appeal to numerous users. A few note initial stickiness during application. Overall, customers consider this a trusted, go-to solution for reliable, long-lasting repairs.
Customer review summary generated by AI, including incentivized reviews.Kind of a fun art project to apply; but a serious
[This review was collected as part of a promotion.] The Flex Seal putty comes together quickly and works great. With a little kneading, it’s very easy to have the right amount of putty for a small project. I reattached a wooden foot to a drawing mannequin, a project which I had previously failed at using regular glue. It does feel a little weird to knead it by hand and I’m not sure I’m totally happy touching whatever chemical this is. The tube is a little hard to reseal but seems to have plenty...
From flexsealproducts.com
Strong, easy repair
[This review was collected as part of a promotion.] I love the ease of use of this product. After just a short time of kneading in my hand, a uniform gray color was achieved. After that, it was a simple process to mold the putty around the broken rebar I was applying it to. I checked the repair after allowing it to set overnight. The bond is strong, and the finish is smooth. The process was easy and clean. The results are great.
From flexsealproducts.com
Dried perfectly
[This review was collected as part of a promotion.] I like how there is no odor to this product. The application is fairly easy although it tends to crumble. It’s a bit hard to get it to smoothen out but once you get the hang of it, it actually looks really nice once fully cured. Overall I am happy with how it looks and works
From flexsealproducts.com
Works under wet conditions
[This review was collected as part of a promotion.] Hard water ate a hole in the water valve on my water heater on Christmas Eve. Flex Seal fixed it while it was leaking and stopped the leak. I prepped the area first as best I could. I also painted over the seal/fix. You can’t tell I repaired it at all. This has so many uses you wouldn’t think of using it for. I’m grateful I had this on hand.
From flexsealproducts.com
Great for plumbing!
[This review was collected as part of a promotion.] Great for plumbing! Not a mess… easy to apply… even me, being not great with repairing managed to use it. And it was really flexible and easy to use!
From flexsealproducts.com
Nice
[This review was collected as part of a promotion.] The application was really easy and simple to apply. The adhesion is strong after it dried down. I used popsicle sticks to smooth down the adhesive
From flexsealproducts.com
Powerful and easy to use!
[This review was collected as part of a promotion.] I was so excited to receive this as I knew I had a home product I was hoping this would help fix. I used this to help seal a hole in my crawl space wired vent space. I tried everything (double sided tape, super glue) to fix the little hole, but nothing helped keep it sealed. I used a little of this putty on each corner and it sealed up the space. I’m so excited to use this in other areas of the house.
From flexsealproducts.com
Strong and durable
[This review was collected as part of a promotion.] Used Flex Seal epoxy Putty to repair a broken head band on my sons headphones and it worked great. Bonus that it saved me from having to buy a new pair of headphones. Was easy to apply and work with . Didn’t leave a big mess just used a small amount as instructed waited for it to set and so far they are holding up really well. Very impressed with the strength and durability. Definitely will use again on other items as needed .
From flexsealproducts.com
Versatile fixer
[This review was collected as part of a promotion.] I used this product to fix a broken wooden leg on my dining room chair. To be honest I wasn't sure if it was going to work, but I was pleasantly surprised. It was easy to work with and the hold is even better than the top selling wood glue! I could even easily sand off any of the extra product. We have been using the chair daily for almost two weeks now and it is holding up like it was never broken. Awesome product!!
From flexsealproducts.com
Super easy for fixes
[This review was collected as part of a promotion.] This stuff bonds to anything that needs a quick fix or seal! Great to have handy around the house. Very easy to use since pliable and you can smooth it out with sandpaper. Be sure to check the color that it dries down to. But definitely a nice multipurpose tool! Highly recommend!
From flexsealproducts.com
Strong epoxy for all repairs
[This review was collected as part of a promotion.] Easy to mix and quick to repair as it dries fast. Can be applied to wet surfaces. Really strong. I used it to repair my floor stone tiles and it was perfect.
From flexsealproducts.com
Does its job
[This review was collected as part of a promotion.] This Flex Seal epoxy ultimate putty in dark gray color gets the job done. It’s super simple to use and seems to have a good strong hold. Great for quick repairs.
From flexsealproducts.com
GET IT!
[This review was collected as part of a promotion.] Amazing!!! This came at thee perfect time! One of my outlets needed to be secured so I used flex seal. EXTREMELY IMPRESSED. The directions were super easy to follow, the bonding went on smoothly and without a mess. I probably need to go back over with one more coat but I couldn’t be happier with these initial results. 1st photo shows how it looked 2nd photo shows the results of just one use . Highly recommend
From flexsealproducts.com
Works great and durable
[This review was collected as part of a promotion.] This epoxy putty is extremely durable. This worked very well on my favorite flower pot that I broke. I odor was not strong and it dried very quickly. Was so happy with the repair that I used it on my broken chair. It is very easy to use. Very quick and convenient. I will be using it on more repairs around my house. Great to have around the house for quick repairs.
From flexsealproducts.com
Works great for home repairs
[This review was collected as part of a promotion.] This actually worked really well. I was moving and had some repairs to do. This worked well for resealing a tile in my bathroom and fixing some holes in a plywood wall as well as sealing a crack in my fridge - it does dry dark grey so it’s better to use it when you are able to paint over it or if appearance after repair doesn’t matter as much. You just need a little sandpaper to even it out after it dries!
From flexsealproducts.com
Works very well!
[This review was collected as part of a promotion.] This worked great at helping to reseal some loose stones on our gate posts, I appreciated how easy it was to dispense the product and how quickly it works. It has held up through rain, wind, and cold temps so I’m loving it so far!
From flexsealproducts.com
Quick and easy to use epoxy putty!
[This review was collected as part of a promotion.] This is a nice small accessible product to carry in your tool box. We had a hole in the wall that it quickly filled, as well as a chipped corner in our bathroom. It sticks well and is flexible to mold. It withstood the bathroom humidity as well!
From flexsealproducts.com
Gets the job done right
[This review was collected as part of a promotion.] This product delivered on exactly what you thought it would. It has a stronghold the perfect putty consistency so it doesn't run when you apply it and it was easy to clean up after my project. I use this to fix my grandmother's fish tank. A small piece chipped and I was able to fix it with the epoxy and cover it with tint film. As expected it cured waterproof and the tank lives on
From flexsealproducts.com
Epoxy hold is strong
[This review was collected as part of a promotion.] Flex seal epoxy is easy to work with and saved my tiered fruit basket. It had snapped at one of the bases and the epoxy was the only thing that was strong enough to hold it in place. I’m hoping this lasts but time will tell. So far this has been an amazing product.
From flexsealproducts.com
Very useful sealant
[This review was collected as part of a promotion.] Very easy to use and apply, and it seems quite strong once set. It appears it will be easy to paint over as well. It hardened faster than I expected, which is something first-time users should keep in mind. The consistency is a bit thick for smaller/finer repairs, but it would work very well for filling larger gaps. Overall, a useful product to have on hand.
From flexsealproducts.com