Friendly Pheromone diffusers and sprays.
Feliway®, pheromone products offer a solution to help manage unwanted, stress-related behaviors in cats. This therapy works by spraying a 'friendly' pheromone in places where your cat sprays. Also available are plug in diffusers. These pheromones pacify cats who are spraying urine around the house.
Mechanical Devices
If you have the problem with your cat spraying in one particular area then a repellant called SSScat might work for you. SSSCAT ™ has two elements: a motion detector and an aerosol can. It will detect the cat's motion and will release a harmless spray. Once this is repeated a few times, the SSSCAT will keep the cat away from unwanted areas
To keep cats out of certain areas there is a product called ScatMat. The ScatMat responds to your pet's touch with a mild, harmless static pulse. Pets soon learn which areas to keep away from.