Propolis, sometimes called bee glue, is an important material for honeybee hives. It’s a complex mixture of plant sap, beeswax, and honeybees’ natural enzymes — and it plays an important role in ...

When bees combine sap from trees with their own discharges and beeswax, they create a sticky, greenish-brown product used as a coating to build their hives. This is propolis, or “bee glue.” Did you ...