The Bohle metal primer is a liquid coupling agent which improves the adhesion of acrylate adhesives on difficult metal surfaces, such as aluminium, chrome or nickel. After cleaning the metal surface, a thin layer of primer is applied. Allow the primer to cure for 5 minutes, then proceed with the usual bonding process. The metal primer does not impair the visual appearance of the bond. Please note: Hazmat, Gound shipment only - cannot be shipped via Air.