Stormsure Tippet Sinker

Squeeze a small amount onto your fingers and then rub it onto the fly line leader and tippet.

When the line lands on the water the Sinker breaks instantly through the meniscus on the water and the line sinks below the surface. The light is refracted by the ent in the meniscus and a floating line is blindingly obvious when seen from below; however is becomes almost invisible when it has broken through the meniscus.