Product Details Loon Outdoors UV Knot Sense gives fly anglers a quick way to smooth and reinforce knots so leaders and tippets pass easily through guides without catching. Apply indoors or in the shade, then cure in seconds with direct sunlight or a Loon UV light. Beyond knots, it doubles as a handy fix for damaged flies when you need a fast streamside repair. Strengthens and smooths knots for easy passage through rod guides Cures in about 15 seconds with direct sunlight or a UV light Useful for quick streamside fly repairs in addition to knot finishing Quantity per pack: 1/2 oz. tube Prop 65 Warning FishUSA Customer Reviews (3) Write a Review 5 Knot… Posted by ADAM OLISEWSKI on July 23, 2024 I used the UV knot sense for the first time and it worked great. It cored in 15 seconds when I used the UV light. I used the UV knot sense for the first time and it worked great. It cored in 15 seconds when I used the UV light.