Loon Outdoors Sink Fast Spey UV Thin is viscous enough

UV Thin is viscous enough to build heads or wing cases

If John Gierach is living in a fool's paradise

It is compatible with all flies (including CDC)

clear flats and for spooky bones

With a long head and back taper this line is an excellent all around fly line on rivers and lakes when long casts and complete line control are required

Loon Outdoors Sink Fast Spey UV Thin is viscous enoughDesigned specifically for sinking and saltwater lines, Loon Sink Fast is a non toxic, water based product that cleans, lubricates and protects fly line from the suns damaging rays. Pro tip Use on new sinking lines right out of the box to improve performance. Water based 1 oz container with spray cap for easy use Best used on sinking and intermediate fly lines Repels water and will actually improve sinking line performance.