The Type I adhesive covered by this specification is intended primarily for use in the structural bonding of aluminum alloy to wood. It shall not be used in aircraft for the fabrication of primary structure or for adhering wood to any metal other than aluminum alloy without the specific approval of the procuring agency.

Type II adhesives covered by this specification are intended primarily for use in fabricating aluminum-wood-aluminum structural sandwich panel constructions, particularly where low density wood cores are used, as well as for the structural bonding of aluminum to wood attachments not of sandwich type construction. It shall not be used in aircraft for the fabrication of primary structure or for adhering wood to any metal other than aluminum alloy without specific approval of the procuring agency. Type II, condition A adhesive is intended for applications where small areas are involved or where heat cannot be used in the final assembly operation. Type II, condition B adhesive is intended or use in cases where the fabrication of large items necessitate a final assembly time exceeding that permissible with the condition A adhesive.