There is an on going debate at my bike co-op about the use of Slime and Stan's NoTubes Sealant. One guy in the shop says "Slime" in just about every sentence when he's talking about wheels, tires, or tubes. If another worker in the shop hears that, he blurts in that Slime will degrade the tubes after time and afterwards, suggests getting a latex based sealant like Stans. They both have their contradictions to the others statements about which sealant to use. I've used slime before, but my tubes haven't degraded since I put it in 3 months ago. I have used Stan's without my knowledge but a torn valve forced me to throw it out.
So my question is this: Which is better assuming you want your tubes to last as long as possible? Should I present the Slime obsessee (if that's a word) with the evidence and tell him that it's not a good thing to suggest?