Plastic Pointers #12 - Polyethylene Reservoir - Incorrect vs Correct Repair

This video demonstrates the difference between an incorrect and a correct way to repair a crack in a plastic reservoir tank. Identifying the type of plastic—such as polyethylene or polypropylene—is essential before starting any plastic welding repair. We show how common mistakes like overheating, applying too much pressure, or using the wrong weld depth can weaken the repair and even damage the part further. Then we demonstrate the proper technique, with attention to heat, nitrogen flow, and welding rod control, to ensure a clean and effective result. Whether you're working on a windshield washer reservoir or another plastic part, following the right process can make all the difference in repair quality and durability. Learn more or place an order: Plastic Cleaner - https://www.polyvance.com/collections... 6122 Heavy Duty Burr - https://www.polyvance.com/products/di... Nitrogen Plastic Welder: https://www.polyvance.com/collections... Polyethylene Welding Ribbon - https://www.polyvance.com/products/ld... ⚠️ Important! ⚠️ Always wear appropriate Personal Protective Equipment (PPE) when performing any repair work. The duration shown in Polyvance’s repair videos is for demonstration purposes only. It does not reflect the actual time needed to complete a full repair and should not be used for estimating labor or repair times. Follow us on social media: Facebook:   / polyvance   Instagram:   / polyvanceofficial   TikTok:   / polyvance   LinkedIn:   / polyvance   Browse our products: https://www.polyvance.com/