Benzaco Scientific, Inc. - ODOR-ARMOR ® Benzaco Scientific Subtractive Odor Control™ makes masking technologies obsolete! We only do odor control. It’s not a “side” item. That means you get odor control experts, not just peddlers. We know your business and the regulations that apply to your business. Benzaco Science chemists and engineers have combined to make Subtractive Odor Control TM an extremely effective method of odor management in municipal and industrial waste treatment plants. Call Rick O'Sadnick at (202) 258-4777 for more information or to arrange an evaluation.