Double-O Double-O® is a highly-concentrated odor counteractant specially formulated to eliminate the stubborn protein odors which result from kitchen fires involving burned meat or poultry, spoiled food, etc. Double-O® is highly effective on sewage related water damages. Mixing:Add 3-4 ounces of Double-O® per gallon of lukewarm tap water. Application:Spray onto sources of odor with pressure sprayer. Add to wall and fiber cleaning solutions as needed. See label for additional instructions.Part of the Unsmoke / Microban restoration product line.