Specifically designed for line-to-line connection knots, the Loon Outdoors UV Knot Sense is a unique way anglers can smooth and strengthen their newly tied knots immediately. Super easy to use and apply, the Loon Outdoors UV Knot Sense comes in a small squeeze bottle, which allows anglers to utilize a very small amount of the formula to cover the rough spots and ends of their connection knot. After it's applied simply cure it with a UV flashlight or by holding it in the sun for a few seconds, it’s that simple. Whether you’re using an RP knot, FG knot, blood knot, uni to uni knot, Alberto knot, or any other connection knot, the Loon Outdoors UV Knot Sense will improve castability, strength, and overall performance of your leader connection knots.