How to Replace a Motorhome or Caravan Window Seal in Double Glazed Opening Windows

[@DaveTranter]

Why didn’t you Mastic it ?

[@philhoward1436]

The seal already has a pre applied butyl mastic on the inside of the outside leg. (This is explained at 4 minutes 20 seconds on the video). This acts against the outside of the van to prevent water ingress.

[@DaveTranter]

Just realised that, Thanks for your reply