Permanent Outdoor Formula: Specially formulated as an exterior permanent staining chalk. It creates sharp, crimson-red snap lines that can withstand weeks of harsh weather exposure, heavy rain, and job-site traffic without fading.

Surface Adhesion: Snaps clean, distinct lines across a wide array of rugged building materials, including rough framing lumber, concrete, brick, stone, and metal.

Convenient Squeeze Bottle: Packaged in a compact 8 oz. squeeze bottle that fits easily into tool pouches. It features a fast-fill spout designed for quick, mess-free refills of your chalk line reels on the move.