How to Repair Welding Spots on Car Windshield?
2 Answers
Here are the methods to repair welding spots on a car windshield: 1. Glass burns can be polished with sandpaper: However, due to the deep marks, there will be obvious indentations after treatment, so it depends on the position, size, and quantity whether to proceed. Generally, car owners can claim through glass insurance. 2. If it severely affects the driver's vision, for safety reasons, it is recommended to replace the glass: If you really want to repair it with tools, you may need grinding and polishing equipment. 3. If it is tempered glass, it cannot be repaired; if it is not tempered, you can slowly grind it with a glass grinder: Car glass is heated in a furnace to near the softening temperature, then quickly sent into air grids with different cooling intensities for uneven cooling, creating different stresses in the main viewing area and the peripheral area of the glass. The peripheral area is in the strong wind position of the air grid for full tempering.
The welding spots on the windshield are usually small pits or dots caused by welding splatter, which can easily allow water ingress or expand cracks. I've repaired them myself a few times—just use a windshield repair kit: First, clean the dust and grease around the spot, then wipe it with the included cleaner. Next, apply the adhesive patch to secure the area and inject resin using the syringe. Finally, cure it under the UV lamp for about 10 minutes. After completion, the spot becomes nearly invisible and helps prevent cracking. However, don’t rush—squeeze the resin slowly to ensure the cavity is fully filled, or the repair won’t hold well. When washing the car, gently clean the glass and avoid hard objects to prevent further damage. If the spot is too large or in a critical line of sight, it’s safer to visit a professional shop to avoid safety risks.
