All Products

Welcome to the complete product collection from RX Auto—your trusted source for high-performance head gasket repair chemicals, cooling system cleaners, and professional-grade tools. Whether you’re facing early signs of engine trouble or dealing with an active head gasket failure, RX Auto offers a proven lineup of products to help restore your engine’s integrity, performance, and longevity.

Our flagship Thermagasket Plus line includes a variety of targeted solutions: head & block sealants for gasoline and diesel engines, specialized formulas for hybrid systems, and bundled kits designed for Cadillac Northstar and other high-failure platforms. Each product is formulated with precision chemical engineering to ensure strong bonding, high-temperature durability, and long-term reliability.

To support proper application and system prep, we also offer a powerful Cooling System Cleaner to remove debris and residue, as well as an easy-to-use Cooling System Bleeder Tool for eliminating trapped air that can compromise sealant performance.

All RX Auto products are designed to work together as a complete system—giving you the confidence to fix issues at home or in the shop with lasting results. Trusted by mechanics, dealers, and DIYers across the country, our solutions are tested, proven, and ready to help you fix your engine right the first time.

Browse our full catalog below to find the perfect match for your vehicle’s repair needs.