The original polyester glazing putty. Can be applied directly to bare metal, body filler, fiberglass and fully cured sanded top coats. Easily fills grind marks, pinholes, low spots and other minor imperfections. Contains ZNX-7™ for superior adhesion to galvanized steel, bare steel, aluminum, SMC, E-Coat and OEM finishes. No shrinkage. Easy dry. Reduces risk of staining. Blue cream hardener included.