Metalprimer Contains: One refill liquid (5 mL) and brush. GC METALPRIMER II is used for bonding resin materials (composites and acrylics) to metals and alloys. It contains special monomer (MEPS thiophosphoric methacrylate) which promotes bonding by penetrating the metal alloy and co-polymerizing with theresin to produce mechanical and chemical resin to the metal bond. This product is effective on both precious and non-precious alloys.