I've got a pair of Conti 4000 Tubulars on the way from PBK I'm trying to figure out which sealant to go with, Tufo, Hutchinson or Stan's? Anyone have any suggestions? I've had pretty good luck with Tufo, but you can get a whole quart of Stan's for $15. It sounds like Stan's may not be effective for that long (there site says 3 weeks to 3 months, depending on weather). I haven't heard anything about Hutchinson. What are you guys using?