ENZYM D is a liquid bacteria/enzyme product that will control odors and open drains. A Big D Industries Brand product, ENZYM D is safe to use on any surface not affected by water. If you smell that cat, a little more than you should, this product will eliminate pet odors and will not be harmful to you or your pet. ENZYM D is excellent for use in public restrooms; it will take care of the odors you cannot see and are difficult to remove. Simply spray it on, leave it and let it get to work.