Comvita Propolis Oral Spray High Strength supports oral health and helps to freshen the breath. Propolis Oral Spray is the original combination of high quality Propolis, Manuka honey, peppermint, clove and myrrh oils formulated to help maintain oral health and hygiene. Comvita Propolis contains a range of bioflavonoids. The bees create propolis from natural resin produced by trees as part of their defence system. We mimic the clever bees by collecting propolis from the hive and using it as a key ingredient in many of our products.