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Welcome to the RX Auto Shop—your one-stop destination for trusted, science-backed solutions to engine and cooling system problems. Our full product catalog includes everything you need to diagnose, treat, and resolve common engine issues like blown head gaskets, overheating, and coolant loss.

Here you’ll find our complete range of Thermagasket Plus head gasket repair chemicals, developed to work across a wide spectrum of vehicle types—from daily drivers and commercial diesels to hybrids and high-risk models like Cadillac Northstar and Subaru engines. Each formula is engineered to provide maximum sealing performance and long-term protection under the most demanding conditions.

In addition to our advanced sealants, the RX Auto Shop features essential system support products like our Cooling System Cleaner, which removes blockages and scale buildup prior to sealing, and our Cooling System Bleeder, which helps eliminate trapped air and ensures a successful chemical repair.

All RX Auto products are compatible with standard and specialty coolants and safe for aluminum, cast iron, and hybrid engine blocks. Designed to work as a complete system, our products are trusted by professionals and DIYers alike for their reliability, simplicity, and proven performance.

Whether you’re fixing a minor leak or preventing a major failure, the RX Auto Shop offers the tools and treatment systems to get your engine running strong again.