Technician A says weld through coating may be either a zinc or copper base. Technician B says that seam sealers are applied to joints of vehicles to protect against corrosion. Who is correct?

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The Answer of Technician A says weld through coating may be either a zinc or copper base. Technician B says that seam sealers are applied to joints of vehicles to protect against corrosion. Who is correct?

Technician a Says Weld Through Coating May Be Either a Zinc