Irwin 5lb Blue Standard Marking Chalk

Clear lines. Consistent snaps. The Irwin 5lb Blue Standard Marking Chalk is the essential fuel for your layout tools. Engineered for maximum "cling," this chalk adheres to the line for a bold, crisp snap while remaining easy to see on almost any jobsite surface. Whether you're laying out wall plates on a concrete slab or marking rafters on plywood, Irwin Blue delivers the professional contrast you need to work accurately.

Designed for the High-Production Jobsite:

• Standard Grade Visibility: The blue pigment provides an ideal balance—high enough contrast for easy reading in bright sunlight, yet easy to clean or cover when the job is done.
• Weather Resistant: Formulated to resist moisture and clumping inside your reel, ensuring a smooth, even flow even in humid conditions.
• Bulk 5lb Value: Stop buying small bottles. The 5lb jug features an easy-pour spout and a secure screw-cap to prevent spills in your truck or gang box.
• Universal Compatibility: Optimized for use in all major chalk reel brands, including Milwaukee, DeWalt, and Tajima, providing a sharp line without "ghosting."
• Precision Ground: The chalk is finely milled to reduce internal friction, extending the life of your reel’s internal gears and line.

Specifications:

• Part Number: 64802
• Color: Blue (Standard)
• Weight: 5 lbs
• Application: Interior/Exterior Layout
• Permanence: Temporary/Standard (Removable)

Don't let a faint line slow down your build. Keep your crew moving with the bold, reliable snap of Irwin Blue. Designed for high-volume use and engineered for clarity, the 5lb jug ensures you’re never caught empty on a big layout day. Stock up on Irwin Marking Chalk at edmfast.com and snap with precision.

The "Master Layout" Bundle 

Bold Lines. Massive Capacity. Professional Accuracy. Pair your 5lb Chalk Refill with these essential site upgrades.

[→ SHOP ALL LAYOUT & MARKING ACCESSORIES HERE]

• [Milwaukee 48-22-3986 100ft Bold Line Chalk Reel] – The Perfect Vessel. This heavy-duty reel is designed to hold more chalk and snap a thicker, more visible line. It’s the ideal companion for the high-volume 5lb Irwin refill.
• [Stanley 34-794 200' Fiberglass Long Tape] – The Layout Anchor. Before you snap the line, you need the distance. This 200' tape allows you to set your marks across massive foundations with non-stretch accuracy.
• [Milwaukee INKZALL™ Jobsite Markers] – Permanent References. For marking dimensions on wet or dusty concrete that a chalk line won't hold. Use these for your permanent "tick marks" before snapping your Irwin Blue.
• [3M™ SecureFit™ 400 Series Anti-Fog Safety Eyewear] – Dust Protection. Snapping chalk lines creates fine airborne dust. These glasses provide the anti-fog clarity and impact protection needed for all-day site work.
• [Watson 005 Flextime™ Leather Work Gloves] – Dryhide™ Water Resistance. Protect your hands from the abrasive nature of chalk dust while maintaining the dexterity needed for fine layout marks.