J-B Weld Plastic Bonder Black 25 ml 2-Pack Syringe Adhesive, Gap-Filling Formula

J-B Weld Plastic Bonder is a black, two-part urethane adhesive and gap-filling system for DIY plastic repairs, supplied as a 25 ml two-pack with a syringe for 1:1 mixing.

• Two-part urethane adhesive and gap filler — bonds many plastic surfaces and fills repair gaps.
• 1:1 mix ratio in a resealable syringe — supports measured mixing and multiple uses.
• Sets in 15 minutes and cures in 30 hours — gives you clear timing for a repair.
• 3770 PSI tensile strength — provides a concrete strength specification for comparing repair adhesives.
• Black set and cure color — keeps the repair material black as it sets and cures.

For cracked or damaged plastic, dents, and bumper repairs, this adhesive combines bonding with gap filling in one repair system. Its listed applications also extend beyond plastic, making it useful for DIY jobs involving several of the compatible material types below. The two-part format is mixed before application, so it is suited to repairs where you can prepare and stir the components together.

What materials can J-B Weld Plastic Bonder be used on?

J-B Weld Plastic Bonder is intended for thermoset and carbon fiber composites, thermoplastics, coated metals, plastic, and PVC. It can also be used on concrete, ceramic and tile, fiberglass, and aluminum. This range supports repairs and bonding jobs across different materials, while its gap-filling function is useful for DIY repair work such as filling dents and repairing bumpers.

• Compatible application materials include thermoset composites and carbon fiber composites.
• Other listed materials include coated metals, concrete, ceramic, tile, fiberglass, and aluminum.

How do you mix and use the two-part adhesive?

Mix the two parts in a 1:1 ratio using the included mixing tray and stir stick. The syringe dispenses the components for that equal-ratio mix, and its resealable cap is designed to help prevent drying out and leaking between uses. This makes the pack suitable for more than one repair session when adhesive remains in the syringe.

• Mixing tray and stir stick are included.
• The black formula is a urethane adhesive that also serves as a gap filler.

How long does Plastic Bonder take to set and cure?

After mixing, J-B Weld Plastic Bonder sets in 15 minutes and reaches its stated cure time in 30 hours. The set and cured material is black, and the adhesive has a tensile strength of 3770 PSI. Allow for the full cure time when planning a repair; the 15-minute set time is not the same as the 30-hour cure time.

• Set time: 15 minutes after mixing.
• Cure time: 30 hours after mixing.

J-B Weld Plastic Bonder suits DIYers repairing plastic parts, filling dents, or working with its other listed application materials who want a two-part adhesive with a defined mix ratio and set and cure times. The 25 ml two-pack includes a resealable syringe plus a mixing tray and stir stick, making it a practical choice for planned repairs that need black, gap-filling adhesive.