What's that milky effect in the corner of my windscreen?
Discussion
The milky area on your windscreens is caused by the laminates seperating. A laminated winscreen as its name suggests is made up of 2 thin pieces of glass with a sandwich of plastic between them so that if the outer laminate is broken by a stone the windscreen does not shatter into a thousand small pieces (toughened windscreens ) so obscuring your vision.When laminated screens were invented back in the days when I was a lad they were fitted into a rubber seal which held the whole assembly together preventing the layers separating . As car manufacturers have got more greedy they have cut costs by bonding the windscreen into the body with adhesive which speeds up the assembly proces.TVR have taken this greed a step further by doing it badly, they bond the screen in poorly so that the inner laminate is secure but the outer layer is not. This allows water to ingress between the two laminates because that is what water does.When water freezes as we all know from basis "O" Level physics (or whatever it is called nowadays ) it expands it forces the two layers apart and hence the layer of plastic seperates from the two glass layers and becomes milky. The only cure is to fix it with a new screen and fit it properly.
'when dry ice changes state it sublimes - straight from solid to gaseous carbon dioxide...'
Yes, funny that. You can have liquid oxygen, but not liquid CO2. Perhaps you have to increase the pressure?
But back to delamination - my old S3 had this problem but the previous owner (or his dealer) had covered it up cheaply and quite effectively by sticking a carefully shaped piece of glossy black plastic over the affected area. Anyone know where I can this stuff? - as my current Griff is starting to go too.
Yes, funny that. You can have liquid oxygen, but not liquid CO2. Perhaps you have to increase the pressure?
But back to delamination - my old S3 had this problem but the previous owner (or his dealer) had covered it up cheaply and quite effectively by sticking a carefully shaped piece of glossy black plastic over the affected area. Anyone know where I can this stuff? - as my current Griff is starting to go too.
'How can water get between the layers?'
Prise the black rubber edging strip up - you'll probably see a gap leading straight to the edge of the screen, where the join between the laminates are exposed. That's where the water gets in. I suppose that if they put sealant in properly when they fitted the screen in the first place, it wouldn't happen.
Prise the black rubber edging strip up - you'll probably see a gap leading straight to the edge of the screen, where the join between the laminates are exposed. That's where the water gets in. I suppose that if they put sealant in properly when they fitted the screen in the first place, it wouldn't happen.
Hi GreenGriff,
As the gamekeeper said, it's the result of the laminated screen seperating and most will have seen this by now. If the cost of replacing the screen is a bit too much, there is a temporary 'tidy-up' you can do to your Pride & Joy:
Get yourself a roll of black electrical insulation tape and use it to create a black border around the edge of the screen. Because this tape stretches, you can follow the curvatures without wrinckles in the tape and you'll be surprised just how much better it will look with that White blemish covered.
It doesn't stand out or look naff so will do until you can replacethe screen!
As the gamekeeper said, it's the result of the laminated screen seperating and most will have seen this by now. If the cost of replacing the screen is a bit too much, there is a temporary 'tidy-up' you can do to your Pride & Joy:
Get yourself a roll of black electrical insulation tape and use it to create a black border around the edge of the screen. Because this tape stretches, you can follow the curvatures without wrinckles in the tape and you'll be surprised just how much better it will look with that White blemish covered.
It doesn't stand out or look naff so will do until you can replacethe screen!
Glassman said:
thegamekeeper said:
As car manufacturers have got more greedy they have cut costs by bonding the windscreen into the body with adhesive which speeds up the assembly proces.TVR have taken this greed a step further by doing it badly...
How is a bonded windscreen more cost effective?Gassing Station | Griffith | Top of Page | What's New | My Stuff