Uni-Rez 2645 Polyamide Arizona Chemical Polyamide ADHESIVE >> Hot-melt A flexible polyamide resin based on dimer acids. This product is used for hot melt bonding of pre-heated metals and plastics (including plasticized PVC). Flexible polyamide resin based on dimer acids. Used for hot melt bonding of pre-heated metals and plastics (including plasticized PVC).