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Windscreen out - but with what should I clean it?

T

tref

PCGB Member
Member
I have successfully cut out the windscreen of my old 944 to go into the 924 Turbo cab project (and rather pleased with myself I am too, given I have seen many bonded in screens broken by so-called "experts" trying to take them out!). How-ever, I now have a fair bit of residual adhesive/rubber/black gunge around the edge. This is all on the black surround of the screen. Any-one any ideas of what can be used to clean it up, without affecting the black surround?

TIA,

Tref.
 
You can get Silicone Sealant remover from the usual DIY places. I've just used some of this stuff on my scuttle while cleaning it ready to receive the new plastic cover. You place it liberally over the glue residue and leave it for a few hours or ideally over night. You still need to invest a good bit of elbow grease scraping it off, so it is not like it just peels off, but it does come off and leaves a nice clean surface behind. I also bought a plastic scraper because I found the glass paint scrapers a bit too sharp for the metal scuttle.
 
Doesn't white spirit clean off some of that stuff? Try that, just attack it with chemicals, its bound it give in eventually....
 
White spirit and meths didn't touch the stuff I was trying to remove. It was a bit like that double sided foam tape stuff. I pulled off the foam stuff as much as I can which left a Silicone Sealant - like rubbery glue residue, not too dissimilar from the stuff they use to bond the windscreen. Scraping is no good as it just stretches so this remover stuff helped lift it off.
 
Thanks guys.

My concern with using anything in-appropriate is attacking the plastic layer of the screens laminate...

Does any-one know what material that is? I might then be able to ask one of the chemists where I work... but then I guess I need to know what the black surround is painted on with too...
 
A quote from one of our resident chemists:

It looks like PVB has some solubility in most common solvents - Whereas PU tends to be insoluble. I suspect that if you find something that can dissolve PU it will almost certainly dissolve the PVB too.

PVB apparently being the layer between the glass on a laminated screen, PU being the adhesive typically used to bond the screen in place.

Damn... looks like a long job with a fingernail then...

I wonder if this is something to do with why some screens start going milky around the edges prematurely - excessive PU used in fitting them?
 
For reference, I spoke to Autoglass, and the technician I spoke to said they don't, they just cut it back with a knife or chisel.
 
For what it's worth the stuff I used is quite thick so you can control accurately where you apply it so you can steer well clear of the screen, edges. And it's not as if it is like that stuff that coursed through the veins of the Alien in the film of the same name - it seems to be quite slow acting, so if you do inadvertently put some where you don't want to you have plenty of time to clean it off.
 
Thanks Scott, It sounds like a useful tube of stuff to have around anyway... might be worth a try on underbonnet insulation[:mad:][:mad:][:mad:] (which fortunately, I don't have anymore!)
 
My underbonnet insulation is starting to come off now, and the foam seems to be turning into power so I think it has to come off. I'm deliberating whether or not to replace, but seems like pointless expenditure.
 
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