HD-Thompson offers a heavy-duty 50/50 Prediluted Antifreeze/Coolant Red for a wide range of vehicles. Our fluids help prevent gel formation, rust, and corrosion, while preserving radiator heat transfer efficiency. It also contains bittering agents to deter accidental ingestion. APPLICATIONS HD-Thompson 50/50 Prediluted Antifreeze/ Coolant Red Fluid is made to enhance your vehicle's cooling system in every way. With its anti-corrosion, anti-foam and ready to use system this product satisfies the needs of your engine, including essential protection against boil-over & freezing. Anti-foam & anti-corrosion system. Amine-free and borax free. Can be used with supplemental coolant additives and is compatible with other coolant brands. Suits cooling systems filters. Suits ASTM D 3306 (for automotive service), ASTM D 4895 (for heavy duty diesel service), ASTM D 4656 (Pre blend automotive service) & ASTM D 5345 (Pre-blend heavy duty diesel service) Contains bittering agents to deter accidental ingestion.