The Supercool Total Leakstop + U/V Dye for metal and rubber components, features patented HFC-Free aerosol technology. The Total Leakstop will fix small leaks in evaporators, condensers, hoses, gaskets and seals. Total Leakstop also contains a full charge of U/V dye to detect future leaks. The built-in BOV adaptor and hose allows easy, single-step application to the low side of A/C systems without additional tools. One can treats one vehicle. Total Leakstop does not contain polymers so it will not harm or clog A/C system components or reclamation and recovery machines.