OX Pro 1.1 kg Permanent Red Marking Chalk Refill Powder

The OX Pro Permanent Red Marking Chalk (1.1kg / 40oz) is engineered for trade professionals who require long-lasting reference lines that maintain visibility on site. This Permanence Level 3 formulation creates marks that resist weathering, enduring rain, UV rays, and temperature changes for up to one month outdoors. The bold crimson pigment maximises contrast on surfaces such as wood, concrete, plasterboard, and block, making it ideal for use in challenging conditions where standard blue chalk falls short. The high-flow nozzle allows for fast and clean pouring into chalk line reels without blocking. Weighing 1.1kg, the bulk tub is designed to reduce downtime during large-scale projects, including structural groundworks, roofing layouts, and floor screeding, where frequent refills could be counterproductive. An advanced quarter-turn cap seals out moisture, preserving the powder’s free-flowing consistency throughout its use. This chalk is compatible with OX Pro chalk reels as well as most standard chalk line tools on site, ensuring seamless and efficient refilling.