Comma Xstream Green Extralife Concentrated Antifreeze 1 Litre Car Winter. This silicate-based antifreeze is suitable for petrol & diesel engines and protects against corrosion, erosion, overheating & freezing. It offers protection from -36°C to +45°C and provides up to 3 years of protection. Officially approved by Opel/Vauxhall, BMW, Saab, and VW/Audi/Seat/Skoda/Porsche. The product is an Ethylene glycol-based antifreeze and coolant, formulated with silicate inhibitors. It offers robust protection against corrosion, overheating, and freezing. Designed for a reliable service life of up to 3 years, it also contains a bittering agent to discourage accidental ingestion.