Bee-Patch bee and wasp plaster. First aid for bee and wasp stings! With the Bee-Patch bee and wasp plasters from Katadyn comes a helper for those painful stings. The patches contain a patented sugar membrane that removes the poison by osmosis and relieves the pain. Bee-Patch relieves pain, swelling and itching after bee, wasp, hornet and bumblebee stings (pain reduction: 5 min 37 %, 10 min 58 %, 30 min 76 %, 1 hour 86 %). The sugar used in the plaster is sealed and does not penetrate the skin. Pack of 5 pieces.