The Nail Nutrition nail hardener from the Sally Hansen care series helps to improve the nail structure for durable and healthy-looking nails. The strengthening formulation with green tea and bamboo bonds the nail layers, seals them and helps to renew sensitive nails. The Sally Hansen Nail Hardener improves the resistance of the nails and prevents cracking, chipping and flaking of nails. The result: durable, shiny nails that withstand daily stress.