Hi Everyone

I have a Honda Civic CTDI diesel 2.2

I have noticed some mould accumulation on the rear seats of my Honda.

I suspect it is the seals on the rear window that is the issue. As nothing is wet and the boot is not wet.

I can find no sign of any other leaks

Is this a simple job to replace the seals or is there some kind of sealant I can use in the gap.

Any help much appreciated

Thanks
Simon.