J-B Weld WaterWeld, 1 Hour Cure, Epoxy Putty Stick - 2 Pack, Off-White (8277-2)

This was so easy to use and worked really well! I am not even close to being a plumber, but this sealed my leak up. Used on old copper pipe in my basement. Drying/curing time was fast and the leak stopped almost immediately. There was enough to seal around my pipe with some left over. Not sure it would be enough to do 2 full fixes but a good amount.

Love that you can use this underwater and it still cures. Water tank safe. I have been using this for pond repairs. Doesn't hurt my skin if I use bare hands. Really good stuff, holds up for years.

had a cracked thru hull fitting I needed to get through the weekend and this stuff cured underwater and held solid. kneaded up easy and set firm in about an hour like the packaging said. used it on a leaking pipe under the sink too and same result.

Normally this stuff works well and sticks to most anything. Did not work on my Fiberglass water tank the developed a leak. Sanded the spot. Cleaned with MEK.. applied JBWeld and 24 hours later filled the tank and the leak re appeared.

It helped me slow down a water pump leak until I got it in the shop

I have used this on multiple statues in my garden to fix them. I really like it. It is a very effective medium. Consistency is like putty. It has held up well. I wore gloves per the instructions and the odor wasn’t too strong. It cured overnight.

Used to seal leak in pool. White color dries quick even under water used prior time and is very durable though does chalk some. Flexes to adapt to site used.

UPDATE: it does not stop leak!! Don’t bother with this a complete waste of money & time! I applied to water pipe that has small leak due to crust buildup at joint. It was very difficult to apply. Kept sticking on to my glove. Then, i pressed it to ensure connection where the leak is, it spread-out uncovering the leak area! I applied another batch on-top : thus, using 90% of the SMALL TUBE! As Shakespeare asked,” Will It Work, Or, Will It NOT Work? That is the question !! I will update in 2 days! Do not buy Because of - difficulty applying and for attaching itself to me - ONE STAR!:(

I got this Waterweld to plug some tiny holes in a concrete drinking water cistern. The stuff works great. You need to use it correctly however. My concrete is Spaulding so if the loose gravel is not removed or sealed first, the Waterweld epoxy will incorporate the grit and not stick properly. I've used this stuff on cleaned concrete, PVC, ABS (all under water) and rubber (at the waterline) and it has held more than a year. I used it originally in summer 2023 and didn't use it all. I wrapped the remaining unmixed epoxy in plastic, used the remainder in the summer of 2024 (worked fine). Then bought another 2 pack in the summer of 24. I have more repairs to complete in summer 2025 and have one tube left. I'm sure it'll work fine when I get to the job this coming summer. If I need more, I will definitely buy this type/brand as it's served me well.

I have not use it or open it yet as I am keeping it for future use. I have recently used JB weld waterweld for my leaking fuel tank earlier and I like so much that I am buying this product again and also just spent quite a bit of money and ordered a range of other JB weld products. Hope these items remains soft and pliable for long storage. Buy the 2-pack to save money. Thank you very much.

My pool filter cracked from failing to drain it properly up at valve housing. Was told not repairable. I tried this and it worked like charm.

A very useful product for filling those knicks and scratches on boat undersides. However kneeding the putty to properly release the curing catalyst is messy and if not done right you won't have a solid repair. I found extended time kneeding the putty sends it into a rapid curing mode making filling a void challenging but not kneeding the putty sufficiently substantially extends curing time or even improper curing leaving a soft repair.

This product is amazing it works just like it advertised it stops leaks on plastic metal and other materials once you use the product it becomes hard like a rock always good to have around for emergencies