KBShimmer Nail Prep is a liquid nail preparation that is used before applying a base coat. This nail prep helps adjust the pH of your nail to help the base coat bond. Just brush on, let dry for 30 seconds, and apply base coat as desired. If you have oily nails, or want to remove lotion before polishing, KBShimmer nail prep can do that too! Just swipe on the nail and use a clean cloth to wipe off while the product is still wet.