The TP-8648 LeakFinder Wind and Water Kit targets body leaks around windshields, rear hatches, sunroofs, sliding doors and more. The kit includes a spray gun for applying fluorescent dye over exterior surfaces, the OPTIMAX Jr. blue light LED flashlight, an 8 oz. bottle of super-concentrated Dye-Lite fluorescent water dye and fluorescence-enhancing glasses packed in a plastic carrying case. The dye does not stain upholstery or any interior materials and will not affect the paint finish. The spray gun can also be used as a pressure washer and for flushing cooling systems.