Putty’s rule-breaking, monomer-free formula is simply revolutionary. Nobody owns application like Putty's zero-chase formula. Shape, extend, play as long as you want, then LED cure for a fast finish. Putty is 23% lighter than acrylics and 16% lighter than traditional hard gels with no sacrifice to durability. The formula provides supreme adhesion with no lifting or separation during wear. Works perfectly as either to sculpt or use as a tip and overlay application. Training Required.