From experience and what people have told me... if it was fitted properly, then u shouldnt have any problems with the seals for alot ofyears.. all depends on the factors where the car has been kept... eg... does the car sit in direct light all day, the heat will cut the life of the rubber. eg.... do they live on the beach? the salt will also have some effect on the rubber..... ....maybe look into the price of replacement rubbers..so u know what u could be up for in the future.