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Irwin 5 lb Black Chalk Permanent The IRWIN Strait-Line permanent marking chalk provides a weather-proof line that will remain visible after weeks of exposure to weather conditions. It¹s durable and wear-resistant so it¹s perfect for long-term jobs or medium traffic areas. The permanent chalk is available in red and black. Weather resistant lines remain visible after weeks of weather, sun and jobsite wear and tearExterior useConcrete layout, roofing, steel and metal fabrication application2 months weatherability
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🇺🇸 Ship from USA · On Agora since 2026
$18.95