Check the listing for details. Permatex 81833 Heavy Duty Rubberized Undercoating Aerosol Can 16oz, 6 Pack. Condition: New. Listed at 206.47 USD. Permatex 81833 Heavy Duty Rubberized Undercoating Aerosol Can 16 oz., 6 Pack Permatex Heavy Duty Rubberized Undercoating now has an improved formula. Rubberized for maximum durability, it seals, protects and insulates. This excellent professional blend all-purpose coating is ideal for home or shop use. Permatex carries a wide selection of undercoating and rust products for auto body along with weatherstrip, trim, headliner and carpet adhesives for interior and trim repairs..Professional blend all-purpose coating that seals, protects and insulatesNow has an improved formulaIdeal for home or shop useRubberized for maximum durabilitySuggested Applications: Automotive frames, rocker panels and wheels, other uses include sealing gutters, roofs, drain systems and tree pruning