Features:Safe for use on turf surfaces Non-resin binders and low pigment solids hold chalk together in a slurry as mark dries Use as a temporary mark on private property where limited exposure is desired Easy clean up with soap and water within 10 minutes of application Designed to be used in Aervoe’s #244 Spot Marker, #245 Marking Stick, or by hand Lead free, non-clogging can empties contents completely Adheres to most surfaces, including pavement, gravel, soil, and grass Can be used for survey, landscape, utility/locator marking, construction and proposed excavation.Aervoe chalks are a special blend of raw materials that are safe on all surfaces and are designed specifically for temporary marking. Mark will disappear in 10 to 20 days when exposed to water, traffic and other abrasions. It can also be washed off with a pressure washer if desired.