Irwin Strait-Line Blue Standard Marking Chalk - 4 Oz

Irwin Strait-Line Marking Chalks have a newly engineered flip-top cap that keeps the chalk in the bottle where you want it and stops it from spilling out in areas that you don't. The flip-top cap, seals the chalk in an air-tight chamber, keeping out moisture and reducing the risk of clumping.

Features

• Interior or exterior use
• Marks are temporary
• Provides great visibility

Applications - Indoor/Outdoor

• Roofing
• Paneling
• Interior layout
• Siding

Specifications

• Color: Blue
• Size: 4 oz
• Compositions: Calcium carbonate, ultramarine blue, silica
• Form: Powder
• Odor/Scent: Odorless
• Relative density: 2.7 to 2.71
• Specific gravity: 2.7 to 2.71
• pH range: 8.5 to 9.5
• Type: Standard
• Weatherability: 1 week
• Permanence: 1

Safety Data Sheet.pdf