JB Weld Waterweld Epoxy Repair Putty - White
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Product Information
Full details
J-B Weld WaterWeld Epoxy Repair Putty is designed for anyone needing to make repairs in wet, damp, or even underwater conditions. Its key benefit is providing a strong, permanent bond in challenging environments without needing dry application surfaces. A potential caveat is the 25-minute working time, which requires prompt application once mixed. This versatile epoxy stick combines resin and hardener into a single, hand-mixable format, offering quick application for plumbing, tanks, and marine repairs, curing to a durable, sandable, and paintable finish.
All features
| Colour | White |
|---|---|
| Model Part Number | 4370 |
| Brand | JB Weld |
Extended Product Information
FAQs
Can J-B Weld WaterWeld be used on drinking water pipes?
Yes, J-B Weld WaterWeld is NSF certified for contact with potable water after a full cure. Always follow application instructions for best results.
How long does it take to fully cure?
While handling strength is achieved in a few hours, a full chemical cure typically takes 24 hours. The product can be drilled, tapped, sanded, and painted after a full cure.
What is the shelf life of WaterWeld?
Unused WaterWeld putty, when stored in its original packaging in a cool, dry place, typically has a shelf life of 1-2 years.
Can I use WaterWeld on hot surfaces?
WaterWeld is not designed for high-heat applications. Its temperature resistance after cure is generally around 200°F (93°C).
How much area can one stick cover?
Each 57g stick provides approximately 2.5 cubic inches of material. The exact coverage depends on the depth and shape of the repair.
Does WaterWeld cure properly in cold water?
WaterWeld can cure in cold water, but the curing time will be extended. Ensure sufficient working time and hold pressure until initial set occurs.
Troubleshooting
Putty is not hardening or curing properly.
Ensure the putty was kneaded sufficiently until it reached a uniform color. If the ambient temperature is too low (below 40°F/4°C), curing may be significantly slowed or inhibited. Try moving the item to a warmer location.
Putty is too hard to knead immediately after cutting.
This is normal as the resin and hardener begin to react. Knead more vigorously to soften it. Ensure the putty was stored correctly and not exposed to excessive heat, which could pre-cure it.
Poor adhesion to the surface.
Ensure the surface was clean, dry (as much as possible for the application), and free of grease, oil, or loose material. Lightly sanding the surface before application can improve adhesion.
Putty is not sticking in a submerged application.
Ensure the area is relatively free of strong currents during application. Press the putty firmly into place and hold for a few minutes to allow initial adhesion before releasing.
Pros and Cons
Pros
- Effective for repairs in wet or submerged conditions.
- High bond strength (4370 PSI).
- Convenient, no-mess hand-mixable stick format.
- Can be drilled, tapped, sanded, and painted after curing.
- Suitable for a wide range of applications including plumbing and marine.
Cons
- Requires kneading to activate, which can be messy if not careful.
- 25-minute working time may be insufficient for very large or complex repairs.
- Cures to an off-white color, which may require painting for aesthetic matching.
- Not suitable for extreme heat applications.
Setup, Compatibility & Care
Setup:
- Ensure the repair surface is clean and free of loose debris. For best adhesion, lightly roughen the surface if possible.
- Cut off the required amount of WaterWeld putty from the stick.
- Knead the putty with gloved fingers until it achieves a uniform color. This activates the resin and hardener.
- Apply the mixed putty firmly to the repair area within 25 minutes of mixing.
- Mold and shape the putty as needed. Apply pressure to ensure good contact with the surface.
- Allow the putty to cure fully. Full cure typically takes 4-6 hours, but handling strength is achieved much sooner.
Compatibility:
WaterWeld adheres to most materials including PVC, CPVC, metal, fiberglass, concrete, and some plastics. It is not recommended for use on polyethylene or polypropylene plastics without surface treatment. Always test on an inconspicuous area if unsure.
Care:
Store unused WaterWeld in its original packaging in a cool, dry place. Once mixed, the putty has a limited working time and cannot be stored. Clean tools and gloves with soap and water before the putty cures.