J-B Weld PlasticWeld Epoxy Putty Stick Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- Plastic repair
- Pvc repair
- Fiberglass
- Gap filling
A hand-mixable epoxy putty tuned for plastic repairs - PVC, ABS, fiberglass, and most rigid composites that metal-focused putties bond poorly. It kneads into cracks and missing sections, cures off-white in a few hours, and can be sanded, drilled, and painted. NSF potable-water certified, though it will not grip polyethylene or polypropylene.
Pros
- Kneads to fill and rebuild cracked or missing plastic that liquid glue cannot bridge
- Bonds most rigid plastics, PVC, ABS, and fiberglass and cures off-white to blend
- NSF-certified potable-water safe, and sands, drills, and paints after curing
Cons
- Will not stick to polyethylene or polypropylene (many buckets, tanks, and tubs)
- 700 PSI is far below steel-reinforced putties, so it is not for structural metal
- 20-25 minute work life is short if you are shaping a complex repair
Specifications
| Type | Hand-mixable plastic-repair epoxy putty |
|---|---|
| Set time | 20-25 min work life |
| Full cure | Functional in 2-3 hr |
| Bonds | Most rigid plastics, PVC, ABS, fiberglass, composites (not PE/PP) |
| Strength | 700 PSI tensile |
| Temp range | Up to 300F |
| Certification | NSF-certified, potable-water safe |
Frequently Asked Questions
- Which plastics does PlasticWeld actually bond?
- Most rigid plastics including PVC, ABS, fiberglass and composites. It will not stick to polyethylene or polypropylene — the material in many buckets, tanks and tubs — which is the limitation to check before buying.
- Is PlasticWeld strong enough for a structural repair?
- No. At 700 PSI tensile it sits far below steel-reinforced putties, so treat it as a plastic rebuild and gap filler rather than a load-bearing fix. It is rated to 300F and cures off-white to blend with common plastics.
- Is it safe for drinking water fixtures?
- Yes, it is NSF-certified potable-water safe once cured, and it sands, drills and paints afterwards. Work quickly though: the work life is only 20-25 minutes, which is short if you are shaping a complex repair.