Bardahl Rodent Repellent SpecificationsBardahl Rodent Repellent contains a formula developed to instantly repel all species of rodents (rats mice squirrels martens etc.). It helps prevent nibbling by animals attracted by the heat of the engine and the food provided by rubber or plastic parts such as upholstery cables hoses and sheaths. Packaged in a 400 ml aerosol can with 100 ml free this product is safe for rodents and does not bleach rubber.How to use: Shake the aerosol. With the engine cold and switched off spray for 4 seconds per linear metre on surfaces likely to be damaged. Repeat weekly if necessary.