Methacrylic acid is typically found in nail primers used in the application process of some artificial nail products, particularly acrylic nails. It acts as an adhesion promoter to help the acrylic nails adhere to the natural nail surface
. Specifically, methacrylic acid is applied as a primer before the artificial nail extender is placed, often in concentrations between 50% and 88% in professional nail primers. These primers are usually labeled "For Professional Use Only" and are distributed mainly to nail salons and beauty supply stores
. It is important to distinguish methacrylic acid from methacrylate monomers like methyl methacrylate (MMA) or ethyl methacrylate (EMA), which are used as liquid monomers in acrylic nail building products. Methacrylic acid serves a different role as a nail primer, not as the monomer forming the acrylic polymer itself
. In summary, methacrylic acid is typically found in nail primers used to prepare the natural nail for acrylic artificial nails, promoting better adhesion of the nail enhancement
