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JB Weld PlasticBonder — Quick-Set Epoxy for Permanent Plastic Repairs
Fast-curing, high-strength urethane adhesive engineered for durable repairs on plastics, composites, coated metals and more. Ideal for DIYers, mechanics, fabricators and anyone who needs a reliable, paintable bond.
Why choose JB Weld PlasticBonder?
PlasticBonder is a two-part, quick-setting urethane adhesive system designed to deliver a lasting, high-strength repair across a wide variety of materials. Whether you're repairing a cracked bumper, bonding a carbon-fiber part, or filling a gap in a composite panel, PlasticBonder offers dependable performance and easy application.
Key features & benefits
- 1:1 mixing ratio: Simple, equal-part mixing — no complicated measurements.
- Fast set time: Sets in approximately 15 minutes, keeping repair time minimal.
- Sandable quickly: Can be sanded after around 30 minutes so you can shape, finish, or paint sooner.
- High tensile strength: Cures to a durable bond with a tensile strength of 3,770 PSI.
- Dries black: Cured material is black — useful for filling gaps or invisible repairs on dark surfaces.
- Versatile adhesion: Bonds thermoset resins, carbon fiber composites, thermoplastics, coated metals, concrete and more.
- Gap-filling: Works as an effective gap filler for broken or uneven surfaces.
- Trusted brand: Produced by J-B Weld — a company with more than 40 years of reputation for strong, reliable adhesives.
Common applications
PlasticBonder is ideal for:
- Automotive repairs (bumpers, trim, housings)
- Composite fabrication and repair (carbon fiber, fiberglass)
- Fixing broken plastic housings and consumer goods
- Bonding coated metals and small concrete repairs
- Situations that require fast turnaround and sanding/finishing
How to use PlasticBonder (quick steps)
- Prepare the surfaces: Clean, degrease and roughen contact areas for optimal adhesion.
- Mix 1:1: Dispense equal parts of resin and hardener and mix thoroughly until color and texture are uniform.
- Apply: Fill gaps or apply a thin bead to both mating surfaces as needed.
- Clamp if necessary: Hold parts together for the initial set period (about 15 minutes).
- Finish: After ~30 minutes the cured epoxy can be sanded, shaped or painted.
Safety & handling
Always follow the manufacturer’s safety instructions. Work in a well-ventilated area, wear gloves and eye protection, and avoid skin contact. Dispose of unused product and containers according to local regulations.
Frequently asked questions (FAQ)
- Does PlasticBonder work on all plastics?
- PlasticBonder bonds many thermoplastics and thermoset materials, as well as composites and coated metals. Test on a small area first if you’re unsure about a specific plastic type.
- How long until the repair is load-bearing?
- PlasticBonder sets in about 15 minutes and can be sanded after 30 minutes, but full mechanical strength develops over several hours. Allow a full cure for critical load-bearing repairs — consult the product label for full cure times.
- Can I paint over the cured epoxy?
- Yes — once sanded and cleaned, the cured PlasticBonder can be painted. Because it cures black, a primer may be needed for light-colored topcoats.
Verdict
JB Weld PlasticBonder is a dependable, fast-curing solution for repairs that require strength and speed. With a 1:1 mix ratio, quick set time, and a high tensile rating of 3,770 PSI, it’s a top choice when you need a permanent bond across plastics, composites and coated metals.
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