What it does! Prevents your lash adhesive from travelling up your lash fan and closing it. It works with all eyelash adhesives. Stops the adhesive in its tracks. How to use it. Apply it with a micro-pore brush or prep brush or brush it comes with. Apply 1mm this from the bottom of the lash line of the lashes while they are still on the glue strip and work as you normally would, reapply when needed.