Sticks to the line until you want it to stick to something else!
Keson ProChalk Rank 1 Chalks are a non-permanent marking solution. Choose your desired size below. Keson designs these chalks for standard duty exterior use. They are perfect for a variety of tasks, including concrete layouts, masonry, paving projects, plumbing, electrical, and roofing. A freshly chalked line yields 4 to 5 strikes. These Rank 1 chalks make for easy cleanup. Any marks will naturally wear or wash away in a few days. Keson has fine-tuned their ProChalk formula to give you a perfect line every time. They pride themselves on their quality and consistency batch after batch. They also manufacture this product right here in the USA!
WARNING: This product contains a chemical known to the State of California to cause cancer. For more information, please see www.P65Warnings.ca.gov