Water Repellent & Wind Resistant: Formulated specifically with high-density microparticles that make it highly wind resistant and water repellent. This ensures the snapped line won't wash away in wet conditions or blow away on exposed slabs.

Ultra-Fine, Semi-Permanent Pigment: Contains a specialized blend of calcium carbonate, magnesium oxide, and carbon black. It drops an extremely sharp, bold black line that resists caking and clumping on your string.

Contractor-Grade Bottle Design: Packaged in a 10.5 oz. moisture-proof bottle featuring a narrow, easy-fill screw-cap nozzle designed to cleanly replenish high-end chalk reels without waste.