A substance used to improve adhesion between the artificial nail and natural nail.

Peter DeSantis of DeEnterprises (a manufacturer of nail care products), there are basically two kinds of nail primers. There is methacrylic acid (MAA) primers and non methacrylic acid primers.These are often known as non-burning primers. The primary function of primer is to bond the acrylic to the nail plate much like the roots of a tree to the ground. Methacylic acid primers contain 60%-100% of methacrylic acid. Non-acid primers do have a slight corrosive property, but are far less dangerous to the skin than acid-based primers. In the event of a spill, non-acid primers are far less likely to cause a chemical burn to the skin.