Ultra-Derm is a non-toxic, non-flammable, water-based application bond intended for use on all skin and lace base hair replacements. For best adhesion, it is recommended that the scalp be totally clean of all bonding residue and oils by using the NX-Gen Effects® Application Kit Steps 1-3. Allow each application to dry before applying the next coat. Use NX-Gen Effects products for thorough clean up. Clients can expect up to three weeks of holding strength.