IRWIN STRAIT-LINE Permanent Staining Chalk is great for extreme outdoor conditions because it can withstand harsh weather conditions and months of jobsite wear. Chalk containers are filled by weight not volume.
4-lb Chalk Line Refill
Crimson Red Permanent Staining Marking Chalk
For Exterior use
Visible after weeks of weather exposure and jobsite wear
Stains Surface and Reduces need for spray sealant