A black plastic fuel tank being repaired with black epoxy from a dual-chamber syringe, surrounded by tools on a wooden workbench.

Best J-B Weld for Plastic Gas Tank Fixes That Actually Hold

ByWelderology Team

When a plastic gas tank cracks, replacing the whole thing isn’t always necessary—or affordable. With the right epoxy, you can make a long-lasting repair that stands up to fuel and vibration. One product that consistently comes up in forums and user reviews is J-B Weld Plastic Bonder Black. This two-part urethane adhesive is known for…