As you can see, there are solvents present but no alcohol. The ingredient called High Flash Naphtha is slow-evaporating aromatic that is used as retarder. If you’re alarmed by the name, don’t be – this just means that this ingredient, being a retarder, improves the flow of other compatible chemicals, which in this case are fuel, oil and moisture. Also, as mentioned earlier in the article, High Flash Naphtha bonds and deteriorates harmful carbon deposits, so it’s purpose is double. By binding to the buildup, it allows easy expulsion of the deposits from the engine.