Irwin Strait-Line permanent staining marking chalk is designed for exterior use where marks need to remain visible after weeks of weather exposure and jobsite wear. The flip-top cap seals chalk in an airtight chamber to keep out moisture and reduce clumping.

• Permanent staining formula for exterior use
• Remains visible after weeks of weather exposure and jobsite wear
• Reduces the need for spray sealant
• For self-chalking line reels
• Flip-top cap seals chalk in airtight chamber
• Keeps out moisture and reduces clumping
• Size: 2-1/2 Lb
• Color: Red

FOR CALIFORNIA SHOPPERS

Hello Californians! Your government wants us to show you the following message:

• ⚠  WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov