Petsafe Ssscat Repellent Deterrent Refills. 3 Pack. Refill can for the Ssscat Spray Deterrent (PDT00-13914) with about 120 sprays per refill can. The safe, harmless spray surprises your pet, reminding him to stay away. Protect furniture, counters, rooms, and more. To refill the unit, make sure the unit is turned off. Hold the refill spray can upright and firmly press the nozzle down into the refill port. Hold for 15 seconds or until unit is full, then remove the can. If spray leaks out, you may need to press harder to complete the seal.