When precision and visibility matter most, the Crescent Lufkin CB25BA HardMark Blue Chalk Refill delivers unmatched performance for professional-grade layout work. Engineered for high visibility and long-lasting durability, this proprietary chalk formula is designed to stand out in any lighting condition, making it the ideal choice for demanding construction environments.

Key Features:

• HardMark™ High-Visibility Formula
  Crescent Lufkin’s proprietary HardMark Blue chalk is formulated to be three times more visible than standard chalks, ensuring bold, crisp lines that remain clear on rough, porous, or dark surfaces—even in low-light conditions

• Contractor-Grade Capacity
  The 2.5 lb bottle provides ample chalk for extended use, making it ideal for high-volume marking tasks on large job sites.

• Anti-Roll Bottle Design
  The uniquely shaped bottle prevents rolling on sloped or uneven surfaces, reducing the risk of spills and improving job site safety

• Fast, Mess-Free Refills
  Features an easy-fill bottle top that allows chalk to flow quickly and cleanly into your chalk reel, minimizing downtime and cleanup

• Professional Compatibility
  Designed for use with all Crescent Lufkin chalk reels and compatible with most standard chalk line tools on the market.

• Durable Packaging
  The rugged plastic bottle is built to withstand tough job site conditions and is easy to store and transport.

Specifications:

• Product Name: CB25BA HardMark Blue Chalk Refill
• Chalk Color: HardMark Blue
• Volume: 2.5 lbs
• Bottle Dimensions: 9.8 in (L) × 6.8 in (W) × 9.5 in (H)
• Weight: 2.75 lbs
• Material: Fine chalk powder
• Warranty: None (consumable item)
• Manufacturer: Apex Tool Group

Ideal For:

• Framing and layout work
• Roofing and siding
• Concrete and masonry marking
• Long-term outdoor applications
• High-contrast marking on dark or rough surfaces