Harvard Chemical Research Pro-Smoke works by micro-encapsulation and is not an odor mask or covering agent. Simply speaking, this product "coats" or "encapsulates" foul-smelling matter, seals the contamination and keeps the odor molecules from entering our airspace. It effectively neutralizes odors in carpets, fabrics, cars, boats, bathrooms, kitchens, garbage bins, dumpsters, etc. 

pH: 6.5 to 7.5.