Intense Hydration, Repair, and Restoration The H2PRO Black Diamond Argan Repair Mask smoothes, strengthens, protects, and restores hair free of parabens, sulfates, phthalates and paraffin. Natural ingredients are powerful to all hair types but also gentle enough for colored or chemically treated hair. Natural color and moisture are sealed in to give a lustrous finish for the most refined, polished look. Give life back to dull hair with this quick absorbing, light mask. To Use: After shampoo, apply moderate amount of mask into hair evenly. Leave in for 10-25 minutes. Preferably use with steam heating. Once hair cools, rinse and style as usual.