Blackline BL54B Black Waterproof Marking Chalk - 5lb

Water Proof, will not wash off even under heavy downpours Snaps a clean solid line Easily washed away with mild soap & water from hands and work clothing Resists being blown away, layouts can be done in windy conditions Wet or Dry application, can be applied to wet surfaces. Simply remove all excess water and SNAP the lines Environmentally Friendly, does not contain any toxic materials and is safe for the environment