This 1979 Firebird front ground effect that has a four-inch crack and a broken tab. These older Firebird parts are made of polyurethane plastic. So for this repair, we will be using Polyvance’s airless plastic welder and urethane welding rod.

Other repair products, such as two-part adhesives, don’t adhere to polyurethane plastic very well. However, when using urethane welding rod as an adhesive, you can get a strong, permanent repair.