JB Weld Waterweld Epoxy Repair Putty - White
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Product Information
Full details
This JB Weld WaterWeld Epoxy Repair Putty 24-pack is designed for professionals and high-volume users who need reliable, waterproof repairs in challenging environments. Its key benefit is the ability to bond effectively to wet, damp, and even underwater surfaces, offering a strong, permanent solution for plumbing, marine, and industrial applications. A potential caveat is the 25-minute set time, which requires efficient application for larger or more complex repairs.
All features
| Colour | White |
|---|---|
| Model Part Number | 4370 |
| Brand | JB Weld |
Extended Product Information
FAQs
Can I use this putty on drinking water pipes?
Yes, J-B Weld WaterWeld is NSF Approved (ANSI Standard 61) for use in potable water applications once fully cured.
How long do I have to work with the putty after mixing?
You have approximately 25 minutes of working and set time after the resin and hardener are fully mixed.
What is the maximum temperature resistance of cured WaterWeld?
Cured WaterWeld can withstand temperatures up to 300°F (149°C) after 24 hours.
Can I sand and paint the repaired area?
Yes, once fully cured (typically within 1 hour), the WaterWeld putty can be drilled, tapped, sanded, and painted for a finished look.
How should I store the unused putty sticks?
Store unused putty sticks in their original packaging in a cool, dry place. Ensure the packaging is sealed to prevent the putty from drying out or curing prematurely.
Is this product suitable for below-waterline boat repairs?
Yes, WaterWeld is specifically designed for underwater use and is excellent for marine applications, including below-waterline repairs.
What is the shelf life of J-B Weld WaterWeld?
Unopened and properly stored, J-B Weld WaterWeld has a shelf life of approximately 3-5 years.
Troubleshooting
Putty not hardening or hardening very slowly.
Ensure the putty was kneaded thoroughly until a uniform color was achieved. In very cold temperatures, warming the putty slightly before mixing may help. Also, verify the product is not expired.
Poor adhesion to the surface.
While WaterWeld bonds to wet surfaces, ensure the area is as clean as possible from grease, oil, or loose material. Roughing up smooth surfaces slightly with sandpaper before application can also improve grip.
Putty is too sticky to handle.
Wear gloves during mixing and application. If gloves are not available, a light dusting of water on your hands can help, but this may slightly reduce adhesion on the contact surface.
Repair failed under pressure.
Ensure the correct amount of putty was used for the size of the repair and that it was applied with sufficient pressure. Verify the 4370 PSI rating is adequate for the intended application's stress levels.
Pros and Cons
Pros
- Exceptional adhesion on wet and submerged surfaces.
- High tensile strength (4370 PSI) ensures durable repairs.
- Convenient, no-mess hand-mixing system.
- Versatile post-cure finishing options (sanding, painting, drilling).
- Bulk packaging is economical for professional use.
- Reliable for critical applications like plumbing and marine repairs.
Cons
- 25-minute set time might be limiting for very large repairs requiring extensive manipulation.
- Requires mixing by hand, which can be messy if not handled carefully.
- Cured color is off-white, which may not perfectly match all surfaces without painting.
- Bulk pack may be excessive for individual or infrequent users.
- Not designed for extreme heat or highly flexible applications.
Setup, Compatibility & Care
Setup:
- Ensure the surface is clean and free of loose debris. While WaterWeld bonds to wet surfaces, removing significant contaminants will improve adhesion.
- Cut off the required amount of putty from the stick.
- Knead the putty with gloved hands until a uniform color is achieved. This indicates the resin and hardener are fully mixed.
- Apply the mixed putty firmly to the repair area within 25 minutes of mixing.
- Shape and smooth the putty as needed. It will begin to harden after 25 minutes and fully cure in 1 hour.
Compatibility:
WaterWeld bonds well to a variety of materials including PVC, ABS, metal, fiberglass, concrete, and ceramics. It is suitable for repairs in plumbing, marine, automotive (non-engine block), and household applications. Avoid use on rubber or flexible plastics where significant movement occurs.
Care:
Store unused putty sticks in their original packaging in a cool, dry place, away from direct sunlight. Ensure the package is sealed to prevent premature curing. Cured repairs can be cleaned with mild soap and water. Avoid abrasive cleaners.