Buster the grey and white cat is looking for a home where he can spend his retirement years eating cat food and playing with scratch posts all day.
The 11-year-old cat has been at Battersea Brands Hatch for 75 days, which is nearly double the average time it takes felines to be rehomed.
He was brought to the centre with his sister Nelly after their owner became allergic to them but it was found that Buster prefers to be on his own.
Nelly was rehomed after a few weeks and Buster is still looking for an owner with patience.
Debbie Coker, rehoming and welfare assistant at Battersea Brands Hatch, said: "Buster is an older gentleman with a really wise face.
"The great thing about taking on an older cat like Buster is that you know exactly what you are getting, as they already have an established character."
He loves gentle strokes and being fussed over. Ms Coker added that he can be aloof but with the right owner he is sure to blossom into a relaxed and content cat.
Cats Protection recently launched a campaign to encourage cat lovers to adopt older felines as its unwanted cats aged 12 or above now wait an average of 96 days before being rehomed - longer than the average 40 day wait.