Crescent Lufkin CB25BA 2.5 lbs HardMark Blue Chalk Refill High Visibility Marking Dust for Construction Line Reels

Achieve Unmatched Line Visibility with HardMark Blue Technology

Elevate your layout precision with the Crescent Lufkin CB25BA 2.5 lb. HardMark Blue Chalk Refill. Developed specifically for professional tradespersons who encounter varying light conditions and difficult surfaces, HardMark Blue is a proprietary formulation designed to be three times more visible than standard blue chalks. Whether you are working in bright sunlight or dim interiors, this high-contrast pigment ensures your snap lines are crisp, bold, and easy to follow. It serves as the perfect marking solution for framing, drywall, and general construction where immediate visibility is paramount but standard chalks fall short.

Beyond the superior chalk formula, Crescent Lufkin has optimized the packaging for job site efficiency. This bulk 2.5 lb. bottle features a unique non-roll geometry, keeping the container stable on sloped surfaces like roof pitches or uneven ground. The easy-fill nozzle design promotes a fast, smooth flow of powder, allowing you to refill your chalk reels quickly without mess or clumping. Compatible with all standard string line reels, this large-capacity bottle ensures you have enough material on hand to handle extensive layout projects without constant trips to the supply store.

Key Features

• HardMark Technology: Proprietary formulation delivers lines that are sharper and more distinct than traditional compounds.
• Superior Visibility: Designed to be up to three times brighter than standard blue chalk for readability in any light condition.
• Anti-Roll Design: Flat-sided bottle geometry prevents rolling when placed on sloped work surfaces.
• Efficient Refilling: Easy-fill bottle top allows for rapid, clump-free flow into chalk reels.
• Bulk Quantity: Large 2.5 lb capacity provides ample supply for major construction and layout jobs.
• Versatile Application: Ideal for interior and exterior use where high-visibility markings are needed.

What's Included

(1) 2.5 lb. Bottle of HardMark Blue Marking Chalk

Specifications

Pro-Tip: Blue chalk is traditionally standard for temporary markings on interior finish work because it is easier to clean up or paint over than red or black chalk. However, "HardMark" blue is formulated for higher visibility and improved adhesion, so always test a snap on a scrap piece of material or an inconspicuous area to ensure it wipes away to your satisfaction before using it on delicate finished surfaces.