The Pk of 12 replacement Polypropylene Welding Rods work well with your plastic welding kit for repairing this type of material. To identify the material, do a burn test on a small sample. Polypropylene burns with no smoke orange flame and a strong odor. These rods are 1/8in. x about 9in. long. Longer lengths and larger diameters are available upon request.
