OX Pro 226g/8oz Permanent Red Marking Chalk Permanence 3, Ideal for Weatherproof Markings lasting upto 1 month, General Construction Line Refill Reels

PERMANENT RED MARKING CHALK – Permanence Level 3 formula delivers weatherproof marks that last up to 1 month outdoors, ideal for long-duration construction layouts and site markings. CHALK LINE REEL REFILL – 226g/8oz bottle designed to refill chalk line reels quickly and cleanly; compatible with all standard chalk reel tools including OX Pro and OX Trade reels. VERSATILE SURFACES – Snaps crisp, bold red lines on concrete floors, timber, masonry, drywall, and exterior walls; trusted by plasterers, carpenters, roofers, and general contractors. WEATHERPROOF FORMULA – Unlike standard blue chalk, this permanent red powder resists rain and moisture, keeping your reference lines visible throughout the job even in outdoor conditions. OX PRO QUALITY – Part of the OX Pro construction tools range, trusted by UK tradespeople for precision, reliability, and professional-grade performance on site.