Murray's Fly Shop Fly Fishing Tips: Pretreating your Dry Flies with Liquid Dry Fly Floatant will keep your dry flies floating longer than by just using Dry Fly Floatant stream-side. The Liquid Dry Fly Floatant waterproofs the individual fibers which makeup the body of the dry fly. This type of waterproofing doesn't allow water to permeate the fly and create "wet spots" in those hidden pockets within the fly. Murray's Liquid Dry Fly Floatant, made by Harry Murray, is available from Murray's Fly Shop: bit.ly/1zTiVOd