Answer
Jul 16, 2024 - 10:31 PM
Weld-through primer is especially useful in automotive repairs, where overlapping metal surfaces are common. SEM® Zincweld 40773 Silver Weld-Through Primer is used on bare metal surfaces that have been prepped for welding, and helps to prevent corrosion between welded surfaces. Weld preparation typically involves grinding or wire wheeling the weld area, which removes any contaminants and oxide coatings on the weld joint. These clean surfaces tend to corrode quickly when exposed to air and humidity, negatively affecting the weld quality. Coating them with weld through primer prevents this from happening, ensuring a strong and durable weld.