WaterWeld Epoxy Putty
Hand-mix putty stick · US · not yet reviewed
Short answer
Set / hardened: 15–25 minutes after application.
Full cure: 1 hour after application.
Used for pressure-containing repairs, drinking-water systems: elapsed time alone can’t confirm it’s ready. Inspect or test before loading.
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Stated times
- Set / hardened15–25 minutes
- Working time ends25 minutes
- Full cure1 hour
From J-B Weld product page · checked 2026-10-24. Anything not listed isn’t stated by the manufacturer.
Conditions & fine print
- Stated conditions: Not stated on the product page
- For plumbing, J-B Weld says to wait overnight before restoring water pressure. Before painting, its support team recommends waiting at least 3 days. Won't bond to polyethylene, polypropylene or polycarbonate.
- Region US. Formulas can differ between countries; check your container.
- Full cure: Plumbing: overnight before pressure
- Entered from the manufacturer source; second review pending. Report outdated information
- Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.
Questions
How long before WaterWeld Epoxy Putty is set / hardened?
J-B Weld states: Sets in 15–25 minutes. This is the manufacturer’s stated time, not a guarantee.
How long before WaterWeld Epoxy Putty is full cure?
J-B Weld states: Fully cures in one hour. For plumbing, wait overnight before restoring pressure. Conditions: Plumbing: overnight before pressure. This is the manufacturer’s stated time, not a guarantee.