100% Water & Weather Proof: Formulated with specialized pigments that resist washing off or bleeding, ensuring your layout lines stay fully visible even under torrential downpours.

All-Weather & Wet Surface Use: Binds effectively to damp or bone-dry construction substrates. Simply wipe away standing or pooled water on concrete slabs or timber before snapping your line. It is also dense enough to resist drifting or blowing away in high winds.

Crisp, Low-Smudge Output: Creates highly legible, scuff-resistant red marks on cured concrete, stone, roofing, and lumber with minimal ghosting or tracking.

Convenient Squeeze Bottle: Contained in an 8 oz. squeeze bottle built for fast, spill-free refilling of standard chalk lines on the fly. It is environmentally safe and washes out of work clothes and off skin easily with mild soap and water.