Unless I'm testing the longevity, I usually layer a base under my lipstick application either to cancel out my natural lip color or to prolong the wear time of the lipstick. Here are three lip primers I'm lovin' right now.
MAC Lip Erase Lip Balm
I love this one for neutralizing my lip color so that it won't tweak the actual color of the lipstick I'm wearing (I have super naturally pigmented lips!). It is flesh-toned and has a nice balmy texture that spreads easily on the lips. It sets to a tacky finish so your lipstick has something to grab on to for a longer-lasting wear. Read my full review here.
MAC Prep + Prime Lip
If the lipstick I'm wearing is opaque or if I don't worry about my lip color interference, then I will use this one. It has a clear balm texture that goes on transparent. You have to wait a minute or so to let it set then follow with the lipstick. It really does help extend the wear time of the lipstick significantly! Read my full review here.
Guerlain KissKiss Liplift
This one is like a mix between the other two. It is slightly fleshed-toned in the tube but becomes mostly clear once blended on the lips. It doesn't neutralize my lip color as well as the MAC Lip Erase Lip Balm but it does tone it down just slightly. It also leaves a tacky base for the lipstick to hold on to. What I love most about this one is the convenient and beautiful stick and the scent — oh the lovely, fruity scent! Read my mini review here.
Do you have any favorite lip primer? What do you do to extend the wear time of your lipstick?