Irwin 64801 Marking Chalk 4 Oz Standard

Product Description

The IRWIN 64801 is a standard marking chalk used to lay down clean, visible lines on job-site surfaces. Compatible with standard chalk reel line boxes, this 4-ounce refill is a staple consumable for trade professionals who need accurate layout lines on a wide range of materials. The chalk formula marks clearly on metal, wood, concrete, cardboard, rubber, and plastic, making it a reliable choice for HVAC installers, plumbers, electricians, carpenters, and general contractors working across multiple substrate types. Sold individually, the 64801 is a straightforward replacement or refill for everyday marking tasks.

This chalk is suited for residential and commercial job sites where layout accuracy matters. Common applications include snapping reference lines for duct runs, pipe routing, framing layouts, electrical conduit paths, and surface cuts. The standard formulation is intended for general-purpose marking rather than specialty applications requiring high-visibility or staining chalk. It works across interior and exterior surfaces in typical field conditions.

Key Features

• Standard chalk formula marks on metal, wood, concrete, cardboard, rubber, and plastic
• 4-ounce fill weight — a practical refill quantity for frequent field use
• Compatible with standard chalk reel line boxes
• General-purpose formulation suitable for a wide range of trade layout tasks
• Lightweight at 0.32 pounds for easy transport in a tool bag or pouch

Compatibility

Designed as a standard refill chalk compatible with most chalk reel line boxes that accept standard-fill chalk powder.

Installation Notes

Fill the chalk reel reservoir with care to avoid spills on finished surfaces or sensitive materials. When snapping lines near electrical panels, live wiring, or energized equipment, ensure power is shut off before work begins if chalk dust could contact live components. Standard chalk lines are generally temporary and may wash off with water or wipe away, so verify line visibility before proceeding with cuts or installations.

Technical Specifications

• Net Weight: 0.32 pounds
• Package Quantity: 1 each
• UPC: 024721500014

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 64801