Circle Systems recommends Mi-Glow UW 12 as a replacement
Mi-Glow® Underwater 528 is red particles. which is used in visible light, black light and blue light, pre-mixed with a powdered Wetting Agent for use in underwater inspection. The particles are finer and lighter, allowing them to remain in suspension longer and enhance finer discontinuities. Designed for use in a variety of underwater inspections, including offshore structural welds, pipeline inspection, ship husbandry and to enhance underwater photography.