This question is one we hear a lot because one of our competitors is claiming that they evaporate faster and that therefore they are better. Mainstream has provided independent lab test results which show that we clean better than all the other competitors tested. *View Qwik-SF lab test results >> Before reviewing these test results, let's think about the cleaning process itself.
If the cleaning product evaporates too fast then it does not have time to dissolve the oil and other impurities, it simply vaporizes and boils off without soaking into the liquid residue and without flushing the liquid waste out of the system. This is not good! Alternatively, we have specially engineered our patented Qwik System Flush® so that it does not evaporate too fast at atmospheric or higher pressures, so that it has time to soak into the oil and other impurities, dissolve them by diluting them, and flush them out of the system as a liquid waste.
Remember, the oil will never evaporate, and if the cleaning solution evaporates before it flushes the waste products out of the system, it will simply redeposit the waste products in another part of the system. Clearly not good! Instead, to properly clean and flush the system, the cleaning product must dissolve and mobilize the impurities, carry these solid and liquid waste products out of the system as a liquid waste stream. The minimal Qwik System Flush® residue that might remain in the system, is completely removed by the evacuation process, prior to refrigerant charging. Even a slight vacuum of only 2 - 3 inches of mercury vacuum would completely evaporate any residual Qwik System Flush®!
As you can see, the logic that you want a very fast evaporating cleaner is simply wrong. What is important is that the cleaner remain a liquid during flushing and then totally evaporates when evacuated. This is exactly what Mainstream's Qwik System Flush® does and is one reason why it flushes better than the other products tested.
Another point to consider is that all other flushes are simply degreasers, they are designed to remove oil, sludge and particulates. But what about the acid and moisture that remains on the metal surfaces? If acid and moisture are not removed, the fresh refrigerant charge will be contaminated with acid and water. Look at the independent, third party test results (performed by a testing lab and a university), we are much much better at removing acid and moisture, because Qwik System Flush® was specifically designed to remove acid and water in addition to sludge, oil and contaminates.
Qwik System Flush® is simply a better product at a better price. We have been shown to absorb water and acid as well as flush impurities, and this product is protected by US Patents #7,566,409 and #7,736,537.