If you haven’t looked up the many health benefits provided by propolis, or the price it is sold for, then do it now! Propolis mats are an excellent way to harvest clean propolis from your hive. Replace your inner cover with our plastic propolis mat. The bees will fill the grooves of the trap with propolis. To harvest, simply put the mat inside a plastic bag and freeze overnight. Scrape off or twist the mat inside the bag to release the propolis.