The StraitLine Chalk Refill Permanent in Red is specifically formulated for outdoor permanent applications, delivering exceptional durability with lines that remain visible for up to 2 months. This red chalk is the ideal choice for long-term marking requirements on construction sites, outdoor installations, and projects where layout lines need to withstand weather exposure and site traffic. The vibrant red colour provides outstanding visibility on a wide range of surfaces, including concrete, asphalt, timber, and masonry. This permanent formulation ensures your marking lines stay clear and legible throughout extended project timelines, eliminating the need for constant re-marking. Features and Benefits:Red colour for maximum visibility on various surfacesOutdoor permanent formulation for long-lasting performanceLines remain visible for up to 2 monthsWeather-resistant formula withstands outdoor conditionsPerfect for long-term construction projects and permanent layout wor