Abstract: Thermoformable, Long Lasting Phosphorescent Acrylic Resin for Castings, Adhesives, Moldings, Coatings and Liquid Inlays are manufactured from thermosetting acrylic syrup, promoters, additives, fillers and phosphorescent pigments and are used to manufacture thermoformed, cast, coated, inlayed, molded articles and reinforced composites. These phosphorescent resins glow-in-the-dark, and exhibit a long lasting, bright glow after exposure to light (photoluminescence). The use of suspending agents keeps the heavy phosphorescent pigments in suspension and results in a phosphorescent resin that has a long shelf life. The Phosphorescent Acrylic Resin compositions disclosed herein may be used in thermoform and thermoset applications to produce solid-surface acrylic resin products with a robust glow-in-the-dark property.