I have read that the door seals on 996/7 can deteriorate and this can lead to water ingress . Not sure how much of a problem this mine doesn't leak at all but I'm getting around the car quietly and treated all the seals with Swissvax seal feed as a preventive.
The results are pretty amazing the rubbers are now supple, soft and look like new.
The process is a simple one just give all the rubbers a good clean with an APC then apply with a cloth, a little goes a long way.
It's not cheap at £42 a bottle but a bottle will last a life time.
Not sure what system targa roof cars have but it may also help to prevent any creaking
The results are pretty amazing the rubbers are now supple, soft and look like new.
The process is a simple one just give all the rubbers a good clean with an APC then apply with a cloth, a little goes a long way.
It's not cheap at £42 a bottle but a bottle will last a life time.
Not sure what system targa roof cars have but it may also help to prevent any creaking