Flux belt manufacturer just contact me minutes ago,the glue used for sticking the belt cannot express by Airplane,because it belongs to flammable and combustible materials. So we suggest you:
1) Buying the glue in your local market.Mill said it is easy to find this kind of glue ,specially to stick the silica gel.
2) We ask the manufacture to stick the belt into the loop in China.But we may need a accurate size for I am afraid a inappropriate size loop cannot install well on your welding machine.You can just tell the length we stick the ends together.e.g:200mm.
3) If you have, would you please suggest your good method to express the glue?