Sorry if going over old ground, I currently seal with epoxy, however I would like to try propionate sealer, problem is I cant source prop granules in scotland, tried eurolures many times no reply.searching net produces suggestions for variety of plastic cups , packing material etc.have any of you guys come up with an easy to obtain ,proven over time substitute for prop granules? I imagine cups, packing materials etc. Are made from various plastics so would produce various results, any good time proven advice much appreciated. Cheers