Salt on any surface will cause corrorison damage and lead to costly repairs. Salt Off Boat & 4x4 Wash has metal protectants and wax in the formula to protect all surfaces, keeping the paint and underbody rust free. Boat & 4x4 Wash is excellent for removing soil and corrosion after an off-road adventure. Salt Off products are safe on your paintwork yet extremely effective on the underside to remove corrosive soil and salt buildup. Wash the salt away easily with the Salt Off Jet Wash with mixer attachment.