Irwin 4935518 Strait-Line 6-oz Permanent Staining Marking Chalk - Indigo Blue
• 6-oz Chalk Line Refill
• Indigo Blue Permanent Staining Marking Chalk
• For Exterior use
• Visible after weeks of weather exposure and jobsite wear
• Stains Surface and Reduces need for spray sealant
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.