Weld-Through Primer Guidelines: Volkswagen
Weld-through primers are generally a zinc-based product that are applied to the mating surfaces prior to welding. Corroding zinc forms zinc oxide which protects the steel. This is called sacrificial corrosion. For a quality weld to be made it’s required that the weld-through primer be removed from the direct weld zone before welding the joint when GMA welding. Many OEMs have a position on when and how to use weld-through primer or when it shouldn’t be utilized. Let’s see what Volkswagen recommends and where this information can be found.
This information, along with other part preparation guidelines, can be found in the vehicle-specific General Information Body Repair, Body Collision Repair Manual ➤ 11.1 Corrosion Protection On Attachments And Welded Parts
Volkswagen states: "Always apply welding primer/structure adhesive (according to the repair manual) to both sides of the welding flange."
Volkswagen recommends the type of weld-through primer in: General Information – Paint ➤ 2.10 Corrosion Protection For Body, Attached And Welded Parts.
Volkswagen states: “Bare welded parts or damaged must be coated with Inox spray or zinc spray first.”
Use the vehicle-specific body repair manuals to determine which type of welding is required for the repair you are performing. Failure to follow OEM procedures sacrifices the safety and quality of the repair.
For additional Volkswagen information, check out the Volkswagen OEM Information page.
Additional I-CAR Collision Repair News you may find helpful:
- Step-By-Step: Accessing Volkswagen Repair Information
- Weld-Through Primer Guidelines
- Welding And MIG Brazing Hotspot
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