Ignite Fluorescent color pigment is used with urethane materials. The Ignite line of liquid fluorescent colorants is compatible with Smooth-On urethane rubbers, urethane plastics, and urethane foams (rigid and flexible). The fluorescent or "glow" effect is maximized under ultra-violet light or "black light." The most dramatic color effect is realized when an Ignite colorant is used with a clear or translucent urethane rubber (such as Clear Flex 50) or plastic (such as Smooth-Cast 325).What Makes Castings Made With Ignite Pigments Appear To Glow? When you add Ignite fluorescent color to a urethane material, more ultraviolet light from the cured material is visible to your eye vs. castings made with SO Strong colorants. The casting appears brighter in ambient light and appears to glow under ultraviolet light.Documentation Technical Bulletin Special Order Items PRODUCT ADVISORY: The products listed below are currently SPECIAL ORDER items and require pre order. Lead times may vary - For more information please contact our staff.799593 - Ignite Fluorescent Colorants - Gallon799594 - Ignite Fluorescent Colorants - Gallon799595 - Ignite Fluorescent Colorants - Gallon799596 - Ignite Fluorescent Colorants - Gallon799597 - Ignite Fluorescent Colorants - Gallon799598 - Ignite Fluorescent Colorants - Gallon799926 - Ignite Fluorescent Colorants - Gallon801601 - Ignite Fluorescent Colorants - Gallon799592 - Ignite Fluorescent Colorants - Gallon799585 - Ignite Fluorescent Colorants - Pint