Here's a composite of various chamois creams I've tried and my findings for each of them:
Chamois Butt'r - good stuff for general use. It wears off/out at about 1 to
1.5 hours.
Chamois Butt'r Eurostyle - same time limitation but definite WOOHOO factor
when you're putting it on.:
http://www.amazon.com/Chamois-Buttr-8-Ounce-Eurostyle-Lubricant/dp/
accessories/B001C69L6K
Sportique Century Riding Cream - This stuff ROCKS! It smells like fermenting beer, though. Works for up to 5
hours as far as I can tell
WONDERFUL stuff. has a beer/hops/yeasty
smell that I kinda like. So far I've done 3 hour rides with it and not a
single problem plus it cleared up an irritation spot I had from the last time
my cream wore off. Less expensive than Assos.:
http://www.amazon.com/Sportique-Century-Riding-Cream-SKU028/dp/B001...
Beljum Budder. This stuff works well, has been great for up to 1.5 hours that I've tried
it. A little thinner than the other two:
http://www.beljumbudder.com/purchase/
Assos - great stuff as well. It doesn't wear off and works even when you put
it on before the swim and forget to put more on for the bike.
Excellent stuff. A touch more expensive than the others but worth every
cent:
http://www.biketiresdirect.com/product/assos-chamois-creme
Bag Balm - gets into everything. Coats the seat. Works like a champ for up to
6 hours and is relatively dirt cheap.
petroleum jelly based. It's a little thick for me anyway and even
when I'm burning up it's still molasses.
DZNuts - Not worth the effort for me. Wears off after about an hour or so.
Does well until that, though.
http://www.amazon.com/DZ-Nuts-Pro-Chamios-Cream/dp/accessories/B003...
Asics Chafe Free Endurance - really good and right up there with the Assos
but is a different consistancy. REALLY expensive but I'm going to keep a tube
around if I find it. There are a number out there now for runners but they're
in 1 and 1.5 Oz tubes for about $5-10 so they're not really affordable for
the long term.
Body Glide - doesn't work for me as a chamois lube. Works great for wetsuit
removal but I think I sweat it off in about 10 seconds on the saddle.