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Lexan, anything i should watch out for ?

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tanshi

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Joined: Tue Jan 09, 2007 10:30 pm
Posts: 7717
Location: Brisbane

Posted: Wed Oct 30, 2013 12:48 pm

IM looking at replacing all the non winscreen windows in a jeep to Lexan.

Anything i should watch out for.? also does anything know a cheap hookup or at least what a good price is?

thanks

shep

Joined: Thu Mar 29, 2007 11:30 pm
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Posted: Wed Oct 30, 2013 1:32 pm

Polycarbonate is what you want, lexan is brittle and can shatter

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henno

I live here!

Joined: Tue Jul 23, 2013 5:56 pm
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Location: Brisbane
Vehicle: Which one?

Posted: Wed Oct 30, 2013 1:38 pm

shep wrote:

Polycarbonate is what you want, lexan is brittle and can shatter

Aren't they one and the same? i.e. Lexan is a type of polycarbonate?

I know what you are saying though. I have had lexan in drag cars before, but a drag car doesn't get knocked around anywhere near as much as a 4x4. Perhaps acrylic would be a better choice?

shep

Joined: Thu Mar 29, 2007 11:30 pm
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Posted: Wed Oct 30, 2013 1:41 pm

Sorry gotta bit mixed up. Lexan is a brand of polycarbonate.

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tanshi

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Joined: Tue Jan 09, 2007 10:30 pm
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Location: Brisbane

Posted: Wed Oct 30, 2013 1:52 pm

lexan is used in bullet proof prison walls in QLD

stockman

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Joined: Thu Nov 05, 2009 10:30 pm
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Location: Canberra
Vehicle: 4wd

Posted: Wed Oct 30, 2013 2:14 pm

There would be different grades.
I'm sure the bullet proof stuff would cost a fuck load.

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tanshi

az supporter

Joined: Tue Jan 09, 2007 10:30 pm
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Location: Brisbane

Posted: Wed Oct 30, 2013 2:15 pm

yes, its also 12-16mm thick. the point is its not fragile

henno

I live here!

Joined: Tue Jul 23, 2013 5:56 pm
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Location: Brisbane
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Posted: Wed Oct 30, 2013 2:22 pm

tanshi wrote:

yes, its also 12-16mm thick. the point is its not fragile

Definitely not fragile. But it's not particularly "bendy".

Compared to glass it is superior in almost every way, however (price being the most obvious difference).

shep

Joined: Thu Mar 29, 2007 11:30 pm
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Posted: Wed Oct 30, 2013 2:29 pm

It scratches very easily and if on a road car can cause issues with road crash rescue

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tanshi

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Joined: Tue Jan 09, 2007 10:30 pm
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Location: Brisbane

Posted: Wed Oct 30, 2013 2:40 pm

Its for the race jeep (unregisteres), it wont be on the drivers door or passenger door so no issues with crash rescue.

want33s

az supporter

Joined: Fri Nov 16, 2007 10:30 pm
Posts: 8134
Location: Sunshine Coast Qld

Posted: Wed Oct 30, 2013 3:58 pm

Poly scratches VERY easily and will be so bad that eventually you won't see clearly through it.
Check out old boat windscreens.

tanshi

az supporter

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Location: Brisbane

Posted: Wed Oct 30, 2013 4:05 pm

what about a layer of clear contact over it that can be replaced every few months

zooky08

az supporter

Joined: Fri Nov 27, 2009 10:30 pm
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Location: imbil/gympie. qld
Vehicle: 03 Jimny

Posted: Wed Oct 30, 2013 4:08 pm

Yep scratches easy. I bought a front poly window for a sierra few years ago.
was about $200 so quite expensive. Destroyed it by putting my window wipers on.

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atari4x4

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Joined: Mon Dec 11, 2006 10:30 pm
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Posted: Wed Oct 30, 2013 4:13 pm

tanshi wrote:

what about a layer of clear contact over it that can be replaced every few months

http://www.quickpeel.com.au/

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tanshi

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Joined: Tue Jan 09, 2007 10:30 pm
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Location: Brisbane

Posted: Wed Oct 30, 2013 4:34 pm

atari4x4 wrote:

tanshi wrote:

what about a layer of clear contact over it that can be replaced every few months

http://www.quickpeel.com.au/

sounds expensive

SierraDan

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Joined: Fri Feb 04, 2011 10:55 pm
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Location: Newcastle
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Posted: Wed Oct 30, 2013 4:50 pm

Lexan is used in many offroad cars.

I think i saw the V8 super cars peel their windscreens off a couple of times during Bathurst.

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Gwagensteve

Joined: Thu Feb 26, 2009 10:30 pm
Posts: 13007
Location: Melbourne

Posted: Wed Oct 30, 2013 5:12 pm

Polycarbonate isn't very UV stable. We found this out with the trolley tug, which had polycarbonate flares for a while until they pretty much exploded from UV exposure. There is coated product which is better but IIRC it's only coated on one side. There is also product with a scratch resistant coating, again, I think only on one side. The scratch resistant coating adds quite a lot to the cost too.

Window tint film is quite scratch resistant, so some light film on the inside will help if you use scratch resistant polycarb with the scratch resistant side on the outside.

Just some thoughts. Poly windows look pretty rough quick in a car that goes bush.

Steve.

tanshi

az supporter

Joined: Tue Jan 09, 2007 10:30 pm
Posts: 7717
Location: Brisbane

Posted: Wed Oct 30, 2013 5:14 pm

Thanks Steve very useful

steve125

Joined: Sun Sep 05, 2010 11:58 am
Posts: 427
Location: Melbourne
Vehicle: LWB Sierra (assembly required)

Posted: Wed Oct 30, 2013 5:24 pm

paid $280 18 months ago to replace the sides and rear window on the Sierra, didn't really shop around so could probably be got cheaper, scratches very easily, the rear is about 4mm or so and is held in by the rubber seal and is quite solid, the sides were only about 3mm and the way they mount means they flex a fair bit.

tanshi

az supporter

Joined: Tue Jan 09, 2007 10:30 pm
Posts: 7717
Location: Brisbane

Posted: Thu Oct 31, 2013 8:25 am

i wonder about clear ish window tint film for outside where its most likely to get scratched.

Blakey

Joined: Sun Mar 04, 2012 6:11 pm
Posts: 464
Location: Brisbane, Petire
Vehicle: Jimny 3"lift Flares 31's

Posted: Thu Oct 31, 2013 10:35 am

just get some clear UV window tint solves the UV problem and its clear so you can see through it

shep

Joined: Thu Mar 29, 2007 11:30 pm
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Location: Here there everywhere
Vehicle: A manly awesome man jimny

Posted: Thu Oct 31, 2013 11:34 am

Why not just weld in some mesh and don't worry about windows?

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tanshi

az supporter

Joined: Tue Jan 09, 2007 10:30 pm
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Location: Brisbane

Posted: Thu Oct 31, 2013 12:47 pm

that has been considered aswell. just looking at all options

just_cruizin

az supporter

Joined: Sun Jun 25, 2006 11:30 pm
Posts: 2867
Location: here

Posted: Fri Nov 01, 2013 6:49 am

What are windscreens for crappy jeeps worth??

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greenzook89 wrote:

31zook wrote:

Makes me want something similar

tanshi

az supporter

Joined: Tue Jan 09, 2007 10:30 pm
Posts: 7717
Location: Brisbane

Posted: Fri Nov 01, 2013 6:53 am

Cheap ish.

just_cruizin

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Joined: Sun Jun 25, 2006 11:30 pm
Posts: 2867
Location: here

Posted: Fri Nov 01, 2013 3:53 pm

Why bother then, mine took a hell of a lot of punishment before it was unusable

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greenzook89 wrote:

31zook wrote:

Makes me want something similar

tanshi

az supporter

Joined: Tue Jan 09, 2007 10:30 pm
Posts: 7717
Location: Brisbane

Posted: Fri Nov 01, 2013 4:00 pm

we wouldnt be swapping out the windscreen any way. only the 3 windows down the sides and the rear tailgate window.

alot of the reason we considered it is weight. 30 kgs of glass up that high is a fair bit.

we might just pull it out and have thin plastic sheet to press stud on and keep the weather out.

just_cruizin

az supporter

Joined: Sun Jun 25, 2006 11:30 pm
Posts: 2867
Location: here

Posted: Fri Nov 01, 2013 7:16 pm

Just ditch it and don't have anything

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greenzook89 wrote:

31zook wrote:

Makes me want something similar

kenn

Joined: Tue Nov 11, 2008 10:30 pm
Posts: 1202
Location: Melbourne

Posted: Sat Nov 02, 2013 6:27 pm

This is the stuff I used

To do this

Got this stuff from Bunnings a few years ago so I don't know if they still stock it.
I used the clear stuff on the top to let some light in and the grey on the sides.

Zook_Fan

az supporter

Joined: Thu Mar 13, 2008 10:30 pm
Posts: 4531
Location: Toowoomba
Vehicle: Maruti and LJ80's

Posted: Mon Nov 04, 2013 7:13 am

It's a rally, just run it. If you're looking out the back you're doing it wrong

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