GRIP #4 is used as a tie coat which promotes adhesion allowing several different surfaces to be painted at the same time thus providing uniform adhesion to repairs which contain a number of different surfaces. GRIP #4 replaces abrasion when preparing panels that are difficult to access such as door shuts, door handle recesses and hood struts. Features & Benefits Ready for use universal adhesion promoter for paints, adhesives and sealants. Use to promote adhesion on all automotive surfaces such as plastics, aluminum and painted surfaces. Ideal for difficult to reach areas such as around door handles and sills. Replaces the need for abrasion and prevents lifting. Large 15 ounce spray can. U-POL Professional Automotive Aerosols also available: CLEAR#1: High Gloss Clear Coat WELD#2: Weld Through Zinc or Copper Rich Primer GRIP#4: Universal Adhesion Promoter HIGH#5: High Build Primer (Gray, Dark Gray, Beige & White) ACID#8: Acid Etch Primer