
J-B Weld
50172 MarineWeld Epoxy Adhesive, 25 ML Syringe
Key Features
AI Generated- Portable packaging lets you carry the epoxy to any repair location.
- A two‑part cold‑weld epoxy that mixes instantly for a ready‑to‑use adhesive.
- Bonds aluminum, metal, composites, fiberglass and many other surfaces securely.
- Engineered for marine use, it holds up in wet and salty conditions.
Delivery and shipping
Local Delivery
Shipping
Return Policy
Easy returns available. Eligibility rules may apply.
J-B Weld MarineWeld is a specially formulated two-part cold-weld epoxy adhesive system designed for strong, lasting repairs on marine and automotive applications. Whether you're bonding metal, composites, fiberglass, or similar surfaces, MarineWeld creates durable repairs that maintain full strength above or below the water's surface, making it ideal for boats, RVs, and watercraft maintenance.
This marine-grade epoxy solves common bonding challenges where standard adhesives fail in wet environments. The convenient 25 mL syringe format makes measuring and mixing simple, and the fast set time means you can get back to your project quickly. Once fully cured, the adhesive can be shaped, tapped, filed, sanded, and drilled to fit your repair needs perfectly.
Features and Benefits
- Two-Part Cold-Weld System: Easy 1:1 mixing ratio with no special equipment required, suitable for DIY and professional repairs.
- Fast Set Time: Sets in just 20 minutes at room temperature, allowing you to continue work and testing sooner.
- High Tensile Strength: Delivers up to 3960 PSI of holding power for reliable, long-lasting bonds on critical repairs.
- Waterproof Performance: Retains full strength both above and below the water's surface, ideal for marine applications and wet environments.
- Versatile Substrate Bonding: Bonds effectively to metal, composites, fiberglass, and other similar or dissimilar surfaces.
- Workable After Cure: Once fully cured to white, the adhesive can be shaped, tapped, filed, sanded, and drilled for custom fitting.
Specifications
- Brand: J-B Weld
- Model: 50172
- Size: 25 mL
- Format: Syringe
- Type: Two-part epoxy adhesive
- Mixing Ratio: 1:1
- Set Time: 20 minutes at room temperature
- Cured Color: White
- Tensile Strength: Up to 3960 PSI
- Environmental Rating: Non-toxic after fully curing
Have a question? Ask owners.
0 questions
Reviews
Customer Reviews
Awesome stuff
Great stuff if people learn to use it properly it would work
Not good for boats
Didn't even stick to the boat, better off with duct tape
Did not hold
Unfortunately, I attempted to weld together a footstep portion of the aluminum stool with JB Weld and it did not hold. It did for a couple days and I sat in the stool and the foot portion broke apart again:(
Works great!
Needed to seal around the light in our hot tub as it kept leaking. Stopped the leak!!!






















