J-B Weld

J-B Weld is a two-part epoxy and are one of the company’s most versatile products. With a paste-like consistency, Twin Tubes are great at filling gaps and cracks. And once cured, they create a permanent bond and can be sanded, drilled, tapped, shaped and painted. Be sure to let it cure completely (24 hours).

Works well on:

• Metals: all, including aluminum and cast iron
• Plastics: most rigid plastics (PVC, CPVC); not ideal for flexible plastics, polypropylene, and polyethylene
• Other: wood, concrete, tile, ceramic,
• Painted surfaces, but it will only adhere as well as the paint to the surfacer

The set and cure times can be impacted by environmental conditions, such as temperature and humidity.

Sets in 4-6 hours, cures in 16-24 hours to dark grey

JB Weld will adhere to paint just fine, but it will only adhere as well as the paint to the surface. Just scrape off what you need to epoxy first. Any epoxy joint needs the surfaces to be as clean as possible. IE. dirt, grease, rust and paint free and scuffed to provide good joint adhesion.

Things I have used J-B Weld for:

• blue plastic recycling bin. The people who collect the recycling throw the bins down after dumping the recycling in the truck and they crack. I got a good couple of extra years out of mine by patching the cracks with J-B Weld. The epoxy dries to a hard, rigid material that acts like a binding material, sort of like welding.
• hayrack window box (or wrought iron rail), PVC coated steel?. The plastic coating on my 20 year old window box was peeling and the metal was rusting. I cleaned it up and used J-B Weld to repair the metal. I got the idea from a website that said you could use an epoxy adhesive for minor repairs on a wrought iron fence. Be sure to remove any peeling PVC, clean off the rust, rub with mineral spirits to thoroughly clean, paint with a rust primer, such as Rust-Oleum primer, repair with J-B Weld, then paint with a Rust-Oleum paint to achieve your final color.