When carpeting is made, it has two protective properties. One is a “dye blocker” or “stain resist” property. This is simply a clear dye that fills in the empty dye sites, so that it is difficult for a spill or spot to penetrate the fiber. The second is a “soil resistor.” This is a product that is sprayed on and baked at a high temperature. This helps to resist against common dry soil, and as a barrier between the spill and the dye blocker. The Carpet Mills recommend re-applying protector after every cleaning. After applying DuPont Teflon to the carpet, more dry soil will be removed with vacuuming, spots will be removed easier, and your carpet will last longer and look better.