IRWIN 4935524 Strait-Line 4 lb. Blue Permanent Staining Marking Chalk is great for extreme outdoor conditions because it can withstand harsh weather conditions and months of job site wear. Chalk containers are filled by weight not volume.

Features

• Visible after weeks of weather exposure and job site wear
• Reduces need for spray sealant
• Stains surfaces

Specifications

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Model No. 4935524 Colour Indigo Blue – Permanent Staining Weight 4 lb.