Yes. A professional acrylic nail brush must first be dipped into an acrylic nail liquid (also known as monomer) to wet the brush. This allows the brush to pick up a bead from your choice of acrylic powder, which bonds together so you can begin sculpting your shape. NSI Nails' acrylic liquids and powders are HEMA-free, MMA-free, 11-Toxin-free, vegan and cruelty-free.