OdorKlenzÂ® Subfloor Treatment Kit. Removing pet odors and urine odors from subfloor can be quite the challenge.Urine odors can build up in your subfloor and begin to damage the flooring adding to the repair expense and also entice your pet to want to frequent in the same area.dorKlenzÂ® Subfloor Treatment Kit. Removing pet odors and urine odors from subfloor can be quite the challenge.