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IRWIN STRAIT-LINE marking chalks have an innovative flip-top cap that keeps the chalk in the bottle where you want it. The flip-top cap seals the chalk in an airtight chamber, keeping out moisture and reducing the risk of clumping. Marking chalk marks are temporary. Provides greater visibility in standard lighting conditions. Durable formula is weather-resistant and suitable for interior or exterior use. Use to show layout changes and corrections on metal, concrete, lumber, plastic, cardboard and other surfaces.
- For use on a variety of surfaces including wood, drywall, concrete, stone and metal
- High visibility chalk for self chalking line reels
- Temporary marking chalk
- Economy size for volume users
- Plastic jug
- Blue
