Mavala Scientifique Nail Hardener is a specialized treatment designed to strengthen and harden weak, soft, or brittle nails. This penetrating formula helps bond nail layers together to prevent splitting and breaking, making nails stronger and more resilient. The product comes in a 5ml bottle with a precision applicator brush for easy application. As this is a nail treatment product containing active ingredients to harden nails, it should be applied only to the nail plate and not the surrounding skin or cuticles. For best results, it should be used on clean, polish-free nails.