Chalk 5 lb - Blue (IRWIN) Keep your layout lines clear and consistent across large projects. This 5 lb blue chalk provides long-lasting coverage for high-volume marking needs. Ideal for roofing, siding, framing, and general construction work, this IRWIN 5 lb blue chalk delivers bold, easy-to-see lines and works seamlessly with standard chalk line reels. Why Contractors Choose It 🔹 Standard visibility – Blue chalk is perfect for general-purpose marking 🔹 Large supply – 5 lb size reduces frequent refills on busy jobsites 🔹 Consistent performance – Clean, reliable lines snap after snap 🔹 Reel compatible – Works with most standard chalk line reels for quick refills How To Use 1. Open your chalk line reel and pour in the blue chalk. 2. Shake lightly to evenly coat the line. 3. Pull out the line and secure the hook at the starting point. 4. Snap the line to mark surfaces clearly, then rewind for the next use. Additional Notes • Ideal for roofing, siding, framing, and general construction layout • 5 lb size ensures long-lasting supply for extended projects • Works with standard chalk line reels for quick, jobsite-friendly refills ⚠️ California Proposition 65 Warning This product may expose you to chemicals including pigments or dust compounds known to the State of California to cause cancer and birth defects or other reproductive harm.
