Irwin 5lb Red Permanent Marking Chalk

Snap lines that stand the test of time. The Irwin 5lb Red Permanent Marking Chalk is specifically formulated for the aggressive demands of outdoor construction. When blue chalk isn't enough to survive the elements, Red delivers a high-pigment, permanent mark that resists fading, foot traffic, and moisture. It is the essential choice for foundation layout, exterior framing, and roofing where accuracy cannot be compromised by a disappearing line.

Engineered for Maximum Endurance:

• Permanent Grade Performance: Designed with a higher pigment load than standard chalk, Red provides a long-lasting mark that stays sharp on concrete, wood, and shingles through multi-day projects.
• High-Contrast Visibility: The brilliant red hue pops against light-colored surfaces like new plywood and grey concrete, ensuring your crew can see the layout clearly even in direct sunlight.
• Weather & Clog Resistant: Milled to a precise consistency to prevent clumping inside the reel. This ensures a smooth, even coating on your line every time you pull, even in high-humidity environments.
• Large 5lb Workhorse Jug: The bulk 5lb container features a secure screw-cap and an integrated easy-pour spout, reducing waste and mess in your tool storage.
• Tool-Safe Formula: Finely ground to reduce internal friction, protecting the gears and lines of your high-performance chalk reels from premature wear.

⚠️ PRO TIP: Red chalk is considered permanent and is difficult to remove. Use it for exterior work or sub-surfaces that will be covered by finish materials.

Specifications:

• Part Number: 64801
• Color: Red (Permanent)
• Weight: 5 lbs
• Application: Exterior Framing, Roofing, Masonry, Foundations
• Permanence: High-Permanence / Long-Lasting

Set your marks and make them stay. The Irwin 5lb Red Permanent Chalk ensures your layout is still there when the sun comes up tomorrow. Reliable, visible, and built for the professional trades, this bulk refill is a jobsite staple. Stock up on Irwin Red at edmfast.com and keep your project on the line.

The "Total Site Layout" Expansion 

Unstoppable Lines. Site-Ready Storage. Professional Precision. Pair your 5lb Red Chalk with these essential site upgrades.

[→ SHOP ALL EXTERIOR MARKING & MEASURING TOOLS 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.