The J-B Weld WaterWeld™ Epoxy Putty Stick (57g) is a hand-mixable, fast-setting epoxy designed for permanent repairs in damp, wet, and underwater environments. Once kneaded together, this two-part putty forms a durable bond that cures strong and watertight, making it ideal for plumbing, marine, and automotive applications.
With a work life of 25 minutes and a full cure in just 60 minutes, WaterWeld sets to an off-white color and achieves a tensile strength of 4370 PSI. Once cured, it can be sanded, drilled, tapped, machined, filed, or painted, providing a versatile solution for emergency or long-term repairs. Trusted by professionals and DIY users alike, this waterproof epoxy putty is perfect for sealing leaks, filling cracks, and repairing surfaces where traditional adhesives fail.
Key Features:
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High-strength waterproof epoxy putty – 4370 PSI tensile strength
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Sets in 25 minutes, cures in 1 hour
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Cures to an off-white finish
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Works underwater and in damp conditions
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Can be sanded, drilled, tapped, machined, filed & painted
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Easy hand-mix formula, solvent-free & durable
Great For:
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Plumbing repairs & sealing leaks
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Marine repairs (boats, jet skis, watercraft)
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Automotive cooling systems & radiators
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Fuel tanks & water tanks
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Cracks, holes, gaps & fittings
Use On: