As above, once you have a length of suitable profile seal it is cut to lengthand the mating ends stuck together to form a complete unit. Woolies are a good source.
Fit it and the glass. You can use proprietary windscreen sealant or silicon. It might also be possible to get a clip on seal to cover the joint.
How to fit the glass into the seal? Have a look on you tube. Years ago paracord would get the outer lip up and over the glass ( my dad was a dab hand at this and I remember helping fit vehicle windows). He'd always put proper mastic under the seal to ensure a watertight fit. One watchpoint is not to put too much mastic/ silicon into the area. Then gently press the rubber to make good contact, not pressing too hard to make it leak out. I seem to remember the proprietary mastic didn't harden but retained flexibility.
It might also be worth contacting an autoglass fitter. They might have experience of similar jobs outside the modern stick back methods.
Aha! Just spotted the window shown looks like a stick on one rather than one that slots into a rubber seal! The paracord method wouldn't work!
Last edited by sospan; 05/03/26 09:25 AM.