Custom Building Products presents a new line of high-performance, ultra-lightweight products featuring CustomLite technology: Prism SureColor Grout, LevelLite Self-Leveling Underlayment and MegaLite Crack Prevention Mortar. CustomLite technology replaces sand in cement-based materials with a lightweight aggregate composed of recycled glass spheres. This leads to lighter weights and smoother, creamier textures, Custom Building says.