For soft, thin nails. Hardening formula instantly seals and hardens nails. Hard. Contains: magnesium; copper; silica. Acrylic hardening formula plus minerals. Forms a break-resistant shield. Supports nails & prevents future damage. Problem: Soft, weak, thin nails that are prone to breaking, chipping, cracking and splitting. Solution: Treat your nails with Nutra Nail Mineral Collection Rock Hardener. Results: Smooth, beautiful, hard nails that resist damage. What it Does: Nutra Nail has added copper, magnesium and silica, essentials from nature, to this unique hardening formula that brushes on clear and instantly forms a smooth, break-resistant shield to support and harden weak nails and prevent future damage. Nails are sealed for added protection from chipping, cracking and splitting. And the beautiful finish lasts and lasts! Get hard, smooth nails with Nutra Nail Mineral Collection Rock Hardener. No formaldehyde, toluene & DBP. Manufactured in the USA.