Originally Posted by maxdustington
I recently learned that WD-40 contains wax. That might explain why it works on hoses so well.
When you say rubber, I think of rubber from a tree. To me, rubber is natural rubber and is rarely encountered (elastic bands?). EPDM is the synthetic rubber that 99% of what the layman calls rubber is made of. You can lube EPDM with silicone or graphite.
To me, rubber means various rubber-like synthetic elastomers, whether ACN, SBR, EPDM, silicone, or urethane. If I had meant natural rubber, I'd have said latex or gutta-percha. I think I'll first try soap and see how that works out. I like the hand-cleaning factor. ;-)