Had enough of brittle nails? You’ll love our Natural Nail Hardener! Use as a protective base under your nail polish or apply on its own as a protective coating. The polish is ideal for treating the nails to make them strong and healthy over the long term. As part of our green range, our nail hardener is made with at least 70% ingredients of natural origin. The AHA acids in the polish make the nail surface appear smoother and more even. Your nails will be forever grateful for the treatment!