IRWIN 4935524 Marking Chalk Refill, Indigo Blue, Permanent

Stains surfaces; visible after weeks of weather exposure and jobsite wear. Reduces need for spray sealant. The flip-top cap seals the chalk in an airtight chamber, keeping out moisture and reducing the risk of clumping.nullnull

• MARKING CHALK
• EXTERIOR
• PERMANENT
• STRAIT-LINE
• 4 POUND REFILL
• Color=Indigo Blue