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Thermagasket Sealants

Who are we

RX Auto is an automotive chemical engineering company specializing in high-performance solutions for engine repair and cooling system restoration. With over a decade of hands-on field testing and formula refinement, we've helped thousands of vehicle owners, mechanics, and service shops solve complex engine problems quickly, safely, and affordably.

Our signature product line, Thermagasket Plus, represents our commitment to creating science-backed head gasket repair chemicals that actually work—products designed not just to seal leaks, but to restore reliability and prevent future failures.

At RX Auto, we combine real-world experience with rigorous testing to offer products that save time, reduce repair costs, and keep engines running longer.

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