Marking Chalk

ProChalk Semi-Permanent (Red and Black) for weather and water-resistant lines that hit and stick for a long time but eventually wear away naturally. Exterior (only) applications include concrete and landscape layout, roofing and metal fabrication.

ProChalk Standard (White and Blue) applications include interior layout, roofing, siding, and paneling, exterior applications may include concrete and landscape formwork. For both interior or exterior use.