These appliances are made of Foam Latex. Most commonly adhered with Pros Aide, Spirit Gum, and/or Medical Adhesive. Most commonly removed with any oil based adhesive remover. Must be sealed with either Pros Aide or Pax Paint before applying alcohol based makeup to appliance. Blend edges of appliances with 99% Alcohol. Bondo can be used if necessary to help blend edges.Small and Large X Cut are sold separately.