This easy-to-apply oil-free eyelash primer goes on clear and has a thin, gel-like consistency. It's purpose is not just to thicken and smooth individual lashes, but also to literally add "grip" to the lashes, so that they can carry and hold more mascara on each lash without clumping or running. This effect will give you the most volume and length possible from your mascara and helps make it smudge-proof. BeautyGARDE Priming Sealant also seals gaps, locking out bacteria and extending the life of lash extensions and the wear time of false lashes. That's right, BeautyGARDE Priming Sealant is completely safe for use on eyelash extensions and false lashes. You're Welcome.