What is the stuff you put around your nails to get nail polish off?

The stuff you put around your nails to prevent nail polish from staining the skin is typically called a barrier or nail polish remover barrier. It's often made from a liquid latex or a specialized adhesive that creates a protective layer. After applying nail polish, you can peel it off, making cleanup easier and preventing polish from getting on the skin. Some people also use tape or Vaseline as alternatives for this purpose.