Propolis What Is Bee Propolis? Did you know that propolis is also sometimes called “bee glue” because honey bees use it for sealing cracks and crevices in the hive? Indeed, propolis is a resinous, waxy substance made by bees and composed of bee saliva, beeswax, and various substances from plants and trees such as poplar, palm, pine, conifer secretions, gums, resins, mucilage, and leaf buds. https://www.nationalnutrition.ca/bee-supplements/propolis.html #Propolis