best thread sealant?

[Francois Dillinger]

i use teflon tape...i think red locktite is a common alternative....i will get the name of the stuff airlift gives you with their struts later today if i remember.

[NegativeCamber]

I've always used teflon tape but its been a hit or miss in getting a perfect seal. what are the other options that work for some of you?