- Interior or exterior use
- Marks are temporary
- Provides great visibility
- Flip top cap to reduce moisture from entering the bottle and reducing spillage due to lost caps
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.
Blue Marking Chalk: Great for interior or exterior use. Provides great visibility. Great for short-term use; will wash away with a few days of rain.