HOW IT WORKS: Day 1: apply one layer of the nail hardener. Day 2: repeat and apply a second layer of the nail hardener. Day 3: remove the layers with nail polish remover and apply a new layer of the nail hardener. Day 4: apply a second layer of nail hardener, etc. Repeat these steps for 30 days. BASE COAT: Works as a Nail Base Coat. Instead of clear nail polish, go for a natural-looking shine by using this nail strengthener for damaged nails. Apply it as a base coat to boost nails’ strength and keep them from breaking or splitting easily. NEW FORMULA: Safe for Your Nails. Our nail hardener contains NO toluene and TFS resin. Made with strength-boosting ingredients, this effective and more intensive alternative to a nail-strengthening polish makes your nails stronger and look gorgeously shiny. NATURAL LOOK: This hardening nail polish, adds a nice shine. Say goodbye to dull-looking nails! This hardener boosts strength and adds a natural-looking sheen similar to what you can get from using clear nail polish or clear nail varnish. NAIL STRENGTHENER EXTRA STRONG: Strengthens Splitting and Weak Nails in 2 Weeks. Don’t let thin and brittle nails hold you back. Apply our nail strengthener and growth polish to build up brittle nails and promote natural nail growth in just 30 days!.