Kleenout - Citrus Deodorizer & Degreaser for Drains and Plaster TrapsKleenout is great for controlling odors in all institutional drains and plaster traps. Plaster trap installations are typically found in a hospital's orthotics and prosthetics department, veterinary practices, dental practices, laboratories and home or professional art studios where clay or plaster is being used. Wherever there are sediments being flushed down, a plaster trap is hopefully installed correctly to avoid serious plumbing problems.