






🛠️ Fix it once, fix it right—waterproof strength that lasts!
J-B Weld Fiberglass Resin is a professional-grade, two-component system designed for fast, waterproof repairs on fiberglass, plastics, metal, and concrete. Ideal for marine, automotive, and home applications, it cures in 2 hours and can be reinforced with fiberglass cloth or mat for enhanced durability.






| Manufacturer | J-B Weld |
| Brand | J-B Weld |
| Model | J-B Weld Fiberglass Resin - Quart - Bath, Marine & Auto |
| Item Weight | 2.49 pounds |
| Product Dimensions | 4.63 x 2.38 x 7.5 inches |
| Item model number | 40122 |
| Manufacturer Part Number | 40122 |
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