Irwin 64907 Green Hi-vis Marking Chalk 8 Oz

Product Description

The IRWIN 64907 is an 8-ounce refill chalk formulated for exterior layout and marking applications. It produces a high-visibility green line that remains legible after prolonged exposure to weather, making it a reliable option for outdoor jobsite work where standard chalk would fade quickly. Tradespeople use this chalk to mark cut lines, layout grids, and reference points on concrete, masonry, lumber, and roofing substrates. It is compatible with standard chalk reel tools and is sold individually by the unit.

This chalk is suited for exterior construction and trade applications where line visibility matters across changing weather conditions. Roofing contractors, framers, concrete finishers, and general construction crews rely on high-visibility exterior chalk when marking lines that need to stay readable through morning dew, light rain, or direct sun. The green color provides strong contrast against concrete, wood, and roofing surfaces.

Key Features

• High-visibility green pigment for strong contrast on exterior surfaces
• Formulated for exterior use — remains visible after weeks of weather exposure
• 8-ounce fill size suits standard chalk reels
• Lightweight at 0.58 pounds for easy transport and handling
• Sold by the unit; minimum order quantity of 6 units per order

Compatibility

Designed as a refill chalk for use with standard chalk line reels commonly used in roofing, framing, concrete, and general construction applications.

Installation Notes

Load chalk into the reel reservoir per the reel manufacturer's instructions, avoiding overfilling to prevent clogging the line exit. Keep the container sealed when not in use to prevent moisture absorption, which can cause clumping. Chalk marking is a layout tool — always verify measurements before cutting or fastening.

Technical Specifications

• Weight: 0.58 pounds
• Color: Green (Hi-Vis)
• Net Fill: 8 oz
• Application: Exterior
• UPC: 024721649072
• Unit of Measure: Each
• Minimum Order Quantity: 6

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 64907