AGT™ Fine Glow Sand is perfect for detailed work such as outlining borders or logos. It’s also excellent for applications in light coloured concrete, stuccos or grouts, GFRC spray mixes, clear epoxies, solvent-based high-build concrete sealers and metallic coatings. Encapsulated particles - designed for use in water-based applications. Particle Size: 250 & 350 mesh. Glow Colors: Aqua Blue, Emerald Yellow, and Sky Blue. Glowing lasts for 12+ hours after 8 minutes of UV (sunlight or UV light) charge. *Should not be used in concentrated, water-based applications like aquariums.