The wax particles in the lube work best when they are dry and merged together as a solid wax . In the bottle the particles are dissolved in water and the water needs to evaporate before the wax particles can merge together as a solid wax coating. Additionally, allowing the wax to fully dry prevents dirt, grime, or road dust to contaminate the wax or create a dirty chain. UFO Drip Wet Conditions will resist rain for a longer period when allowed to dry completely. 8 hours is the standard amount of time for a chain to fully dry. Arid climates may be quicker, and humid climates may take longer.