Weld-Through Primer Guidelines: Volkswagen

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Weld-Through Primer Guidelines: Volkswagen

Weld-through primers are generally a zinc-based product that is 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 MIG 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. Volkswagen states:

“welding primer must always be applied to both sides of welded flanges.
always apply welding primer between joint flanges.
to use part number D 007 500 04 for weld-through primer.
DO NOT use zinc spray when in areas where adhesives are being used.”

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 will sacrifice the safety and quality of the repair.

For additional Volkswagen information, check out the Volkswagen OEM Information page.

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