Keson ProChalk Permanent, Waterproof Chalk Dye (3 lbs.) - Blue
Level 4 Performance

Waterproof Permanent Marking Dye

ProChalk Permanent chalk for weatherproof and waterproof lines that aren’t going to go away any time soon. Most users are choosing this level of intensity for applications that are going to be covered. This level is engineered for more extreme conditions. Exterior applications include exterior layout, extreme conditions, concrete layout, long-term applications.

NOTICE: These are concentrated marking products. Lines snapped with ProChalk Semi-Permanent, Permanent, and Ultimate Dye grades may be visible as long as one year after striking. The colors also may bleed through light-colored paint.