Granville Zerocol Red Antifreeze & Summer Coolant is an ethylene glycol-based engine coolant concentrate featuring Organic Acid Inhibitor Technology (OAT). It is free from nitrates, amines, phosphates, borates, and silicates, offering 5 years or 250,000km of protection. Unlike standard coolants, it provides excellent hard water stability and very low inhibitor depletion rates, along with advanced anti-corrosion defence for all metals and alloys in vehicle cooling systems. It performs at normal use temperatures of -22°C (33% product) and severe use temperatures of -40°C (50% product). The product is a pink/red, odorless liquid supplied in a 5-litre bottle made in the UK and complies with various industry standards including BS 6580 (2010) and VW TL 774 D & F.