Sentry Coatings manufactures an Intruder Deterrent coating which prevents unathorised access to property. Sentry IntruderDeterrent is a non drying, non-toxic compound made using recycled vegetable oil and, when applied to tops of walls, drain pipes, poles etc;, makes it virtually impossible to climb. Sentry Intruder Deterrent also contains a hidden identifier which stains skin and clothing which reacts to UV light, aiding detection. Easy to self apply by brush or scraper, Sentry Intruder Deterrent is a low cost alternative to conventional means of perimeter protection. Sentry Coatings also manufactures a bird repellant compound, "No Perch", which prevents birds from perching in areas likely to cause health problems or damage to property. Â