Keson ProChalk Ultimate Permanent Waterproof Chalk Dye (5 oz.) - Blue

Keson ProChalk Ultimate Permanent, Waterproof Chalk Dye (5 oz.) - Blue
Level 5 Performance

Waterproof Permanent Marking Dye

ProChalk Ultimate Dye which is almost 100% pigment for lines that are intended will be laid down once. Period. Exterior applications include concrete layout, exterior layout, extreme conditions, long-term applications.