Pump some muscles into your weak nails with XTRA! This concentrated treatment delivers the nourishment your weak nails need! DirectionsBegin with clean nails shaped square o rounded. Treat with one coat of Nail Tek. Begin at the half moon, stroking toward the end of the nail. Be sure to keep all nail products away from cuticle and skin as they may cause dryness. Color with two coats of your favorite shade of nail polish. Protect with two top coats of Nail Tek. Apply daily as a top coat over polish. After one week, remove all polish and begin again.