Universal adhesion promoter for use with paints, adhesives, and sealants. Promotes adhesion on plastics, aluminum, and painted surfaces. 15 oz spray for hard-to-reach areas. * Grip #4 packaged in an aerosol is quick, easy & convenient to use. * Enhances adhesion to all auto body surfaces - plastics, aluminum, painted surfaces, galvanized sheet, zinc, fiberglass & bodyfillers. * Maximises adhesion to repairs containing different surfaces. * Promotes adhesion around areas that are difficult to access & abrade (door handle recesses, bonnet struts, scuttle grills & bumper groves).