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💪 Fix it once, fix it right — even underwater!
J-B Weld WaterWeld is a hand-mixable, two-part epoxy putty stick that cures underwater and is NSF certified safe for potable water. It sets in 25 minutes and fully cures in 1 hour, delivering a strong 1300 PSI bond that withstands continuous temperatures up to 300°F and intermittent spikes to 350°F. Ideal for plumbing, fuel tanks, pools, boats, and more, it adheres to metals, plastics, fiberglass, and concrete, making it the go-to heavy-duty repair solution for professionals and DIYers alike.
| ASIN | B0B5VGVG9F |
| Best Sellers Rank | #13,807 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #42 in Epoxy Adhesives |
| Brand Name | J-B Weld |
| Color | Off-White |
| Compatible Material | Metal |
| Container Type | Pail |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,387) |
| Full Cure Time | 6E+1 Minutes |
| Global Trade Identification Number | 00043425990488 |
| Item Form | Stick |
| Item Package Quantity | 1 |
| Item Type Name | Epoxy Adhesive |
| Manufacturer | J-B Weld |
| Material Type | Epoxy Resin |
| Model | 8277-2 |
| Other Special Features of the Product | Chemical Resistant Against Petroleum, Hyraulic Fluids and others when fully cured, Cure Color White, Cures Under Water, Once Cured, can be Tapped Drilled, Painted and Sanded, Sets & Cures Underwater - Apply to dry surface first, Strong |
| Specific Uses For Product | Repair |
| Tensile Strength | 1300 Pounds Per Square Inch |
| UPC | 043425990488 |
| Unit Count | 113.4 Grams |
| Volume | 118.29 Milliliters |
| Water Resistance Level | Waterproof |
V**N
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.
A**R
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.
D**O
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.
A**R
Great Product
D**E
Used this product to fix leaks holes on canoes and pontoon floats as well as a cracked plastic utility tub. Worked great in all uses!! I combined with the syringe product in some cases, but the putty sticks are very easy to use since you can get it exactly on the right spot easily! Recommend this and other J-B Weld products highly!