Flexible finish for swimmers and flexing parts. Can also be used as a wader repair. Great for coating knots for strength. The viscous formula is easier to work with. Usage tip: Apply all UV curable products in full shade or indoors. If you flash with a UV flashlight for 30 secs, you can continue working on the fly. To completely cure resin, expose to sunlight or use a flashlight for about 3 minutes.