Hi, I'm about to order some new sealed units to replace misted up ones. I know the dimensions etc but, on watching a couple of YouTube videos on how to correctly fit the new panes, I see there is something called a bridging packer. These seem to different to the usual coloured plastic glazing packers in that I think they allow water to run underneath them whereas the usual packers wouldn't as the have a type of grid formation on the underside. Does this sound right and, if so, where would you usually get these bridging packers as I can't seem to find any.
Cheers
NS
Cheers
NS