expiry

Hey Guys, I've bought many many rubbers recently including Tenergy 05 FX for future stock but I'm now worried if they expire before i use them. Is there any expiry date of a rubber from a date of purchase? Do rubbers get spoiled if not used for a long time? how to protect un-used packed...

Hey guys, I opened my drawer and found myself a province hurricane rubber, unopened, still in its original zealed package. I would estimate that I got it maybe 2-3 years ago. Meanwhile my friend who just came back from HK bought me a new province hurricane rubber. So I am not sure which one...