Just speaking to our adhesive supplier and he has some black MS polymer (same sort of stuff as Tiger Seal, but has the Iso cynate component removed. This is something H&S bods have an issue with). MS polymer has the same bonding and sealing properties as Tiger Seal (which is a Polyeurethane).
Anyway he has some stock that has 5 months shelf life left and he wants to clear it. I said I'd ask if anyone is interested on here for some. He has 310 ml cartridges and they are £4 each plus shipping. Anyone interested?