TechnicianVision · Knowledge base
Weld-Through Primer Guidelines: Mitsubishi - UPDATE
I-CAR · January 28, 2021 · Mitsubishi
Summary
Mitsubishi recommends applying an electroconductive weld-through primer (spot sealer) to the mating surfaces of panels prior to squeeze-type resistance spot welding (STRSW) to prevent corrosion. However, they do not specify or require its use when performing GMA (MIG) welding.
What to do on the job
Apply an electroconductive spot sealer to the contact surfaces of both panels before squeeze-type resistance spot welding, ensuring it is dry to the touch before welding, but do not use it for GMA welding.
How to use it
Use this document to justify the labor and material costs for applying weld-through primer/spot sealer on Mitsubishi vehicles when performing squeeze-type resistance spot welding (STRSW). It can also be used to defend why weld-through primer is not applied to GMA welded joints, as Mitsubishi does not specify its use for GMA welding.
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