“Duraline is a special transforming liquid that will turn any powder eyeshadow into a liquid formulation”
However, I use it differently! After using gel eyeliner for a long time sometimes it gets a little dry, especially my bobbi brown and MAC one. One drop is usually enough to get the gel eyeliner back to life.
I bought mine from Macy’s (store, not available online) but you can also buy it from Inglot’s website Buy Now – Inglot Duraline $9