TSI Supercool 22779 Solvent-Based A/C Flush - 1-Gallon is an extremely effective cleaner. It quickly penetrates and removes oil, debris and other contaminants from A/C system components. Our fastest evaporating flush, the non-corrosive formula leaves no residue, however, it's extremely flammable. Professionals worldwide trust TSI Supercool Quality Products and Great Service Standards.