Chalk Powder is specially formulated for use with chalk line reels. This chalk powder makes bold and solid lines that are easily detectable and won't blow away. This product works best on wood, concrete, and other hard porous surfaces.
 
MARKING CHALK POWDER - A high grade formula and colored to mark distinct, solid lines that won't blow away.
 
APPLICATIONS - Marking Chalk Powder is ideal for all exterior construction projects, including exterior layouts, concrete layouts, and various industrial uses.
 
SURFACE USE -This chalk makes temporary markings that adhere well to wood, concrete, and other indoor and outdoor surfaces.