Propolis

Propolis (also known as bee resin) is a solid, resinous substance consisting of various natural components. The name comes from the Greek "pro" = for, "polis" = city, a product "for the state" which is of great benefit to bee colonies in many different areas, for example as a building material for insulation and repair work. The bees seal the hive, their dwelling, against moisture, draughts and bacteria as well as microbes.