Irwin Strait-Line marking chalk is great for extreme outdoor conditions because it can withstand harsh weather conditions and months of jobsite wear. Indigo Blue - Permanent Staining. Visible after weeks of weather exposure and jobsite wear. Reduces need for spray sealant. Stains surfaces.
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Irwin Strait-Line marking chalk is great for extreme outdoor conditions because it can withstand harsh weather conditions and months of jobsite wear. Indigo Blue - Permanent Staining. Visible after weeks of weather exposure and jobsite wear. Reduces need for spray sealant. Stains surfaces.
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