August Race™ Bio-D Antifreeze is a non-toxic, biodegradable winterisation fluid developed for the protection of onboard water systems in marine and leisure environments. Formulated using food-grade propylene glycol and glycerin, combined with low-toxicity corrosion inhibitors, it provides effective freeze and burst protection while remaining safe for potable systems when flushed correctly. Free from nitrites, amines, phosphates, borates and azoles, it offers a safer alternative to traditional antifreeze products while maintaining high-performance protection down to −50 °C depending on dilution.