Otter Butter is a hand crafted fly line and leader dressing made in the US. ~ Peter Arfield is the sole stockist in the UK.Otter butter is brilliant on silk lines, furled leaders What you guys do to accelerate the "making off" a silk fly line. I just to take the new ones out of the box and grease everyday and massaged it with my Zoom in on Butterflies NWF Ranger Rick Other Fly Fishing Accessories Moonlit Fly Fishing