Medea is a high quality beeswax thread sealer that can be used on all threaded parts to seal joints. It will help to prevent air entering the system and stop bubbles and leaks in the airbrush cup and bottle. It is simple to use after a deep clean of the components, just apply to the threads of the nozzle and/or head cap on the two opposite sides before gently screwing shut. This will help extend the life of your parts and is safe to use on all parts but do be sure to keep the sealer away from the air and paint passageways.