SprayMax 3680251 1K Zinc Weld-Thru Primer Silver Gray Aerosol 500ml

The SprayMax 3680251 1K Zinc Weld-Thru Primer is a professional-grade, zinc-based aerosol primer engineered to deliver superior corrosion protection between welded metal surfaces. Packaged in a convenient 500ml aerosol can, this silver gray primer is purpose-built for spot welding applications, metal fabrication, automotive bodywork, and the repair of damaged zinc surfaces.

Key Features:

• Specifically formulated for use as a weld-through primer — applied before welding to protect metal joints from corrosion
• Provides superior corrosion protection for water and weather-exposed structures and metal panels
• Ideal for coating inner panel edges during spot welding to prevent corrosion between joined surfaces
• Compatible with MIG and TIG welding — minimizes welding spatter and reduces heat-affected zones
• Adheres strongly to iron, steel, and cleaned metal surfaces
• Fast-drying formula — dust-free in 5–10 minutes, touch-dry in 30–40 minutes, fully cured in 24 hours
• Dry film thickness of approximately 1.4 mil per coat
• Can be recoated with itself at any time; overcoatable after 45 minutes with SprayMax 1K 3in1 Shade
• Features a variable spray nozzle for precise application control
• Silver gray color — Part No. 3680251

The SprayMax 1K Zinc Weld-Thru Primer is the trusted choice of professional bodyshops and fabricators for automotive repair, restoration, and industrial metalwork. Its aerosol format delivers body-shop quality results with maximum convenience — no mixing, no spray gun required.