Over the years the Keson formula for ProChalk® has been fine-tuned to produce chalk that performs with consistent excellence, batch after batch. Keson ProChalk® High Visibility Intensity chalk is formulated to meet the diverse needs of customers. The color and amount of the pigment determines the vividness and permanence of the line. The High Visibility Intensity chalk sticks to your line until you decide you want it to stick to something else.

The ProChalk® High Visibility Intensity chalk includes Glo-Orange, Glo-Lime-, and Glo-Yellow formulations for highly visible applications that will wear or wash away naturally in a few days. Exterior applications include correction, plumbing, electrical, roofing, and masonry.