Defender rear door window

The seal around the window in the rear door of my '91 110 Defender is all falling apart and growing mold, so I want to take the glass out and give the whole lot a good clean up.

Before I take everything apart and possibly make a cock up Is the seal around the window a proper rubber seal, and if so what part number. Or is it usually just a big bead of silicone sealant?

use sealant.....ten min job

I dont think LR ever put a seal on the rear window, think its just sealant.

Bet thing to use as a replacement is DumDum.

RTV is for bathtubs...