X2O waterproof spray can be applied to your drone with IPX4 water protection. The liquid coating your drone acts like a water repellent layer and slips the water away. If the waterfall splashes some water on your drone, it won't be harmed. Also, it won’t be affected by the sun or cold weathers, since it is perfectly functional from -50°C to 140°C. You can fly your drone in rainy days and hot days.