Check the listing for details. Super Tech RV and Marine Antifreeze, 1 Gallon. Condition: New. Listed at 10.00 USD. The Super Tech RV and Marine Antifreeze in 1 Gallon is a high-quality product designed to protect and maintain the cooling systems of recreational vehicles and boats. Manufactured by Super Tech, this antifreeze is specifically formulated to provide effective protection against freezing and overheating, ensuring optimal performance and longevity. With its reliable brand reputation and high-quality ingredients, this antifreeze is a trusted choice for RV and marine enthusiasts looking to safeguard their vehicles' cooling systems.