Infused with diamond dust and pearl powder this toluene and formaldehyde free nail strengthening formula is powered with dimethyl urea dmu and criss cross keratin technology that gently hardens the nails without causing then to become brittle suitable for sensitive nails to use apply one thin coat daily for 4 days remove and repeat treatment 3 times allow nails to rest for 1 2 weeks in between treatments please note due to a recent changes the pink renunail strengthener is no longer as