Front window repair
Thread Starter
Racer
Joined: Jul 2007
Posts: 256
Likes: 0
From: Glasgow, Scotland
Front window repair
im getting a new front window for my 78 vette, justing wondering when the old one comes off, I will have treat a small of rust etc, is it ok to paint window frame with por15, or does the new window bonding glue stuff need to stick to bare metal??
dave
dave
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Wire wheel everything till it's bare. Apply Por-15, let it cure, depending on type of window sealer used, apply a top coat of a sealer primer, and then the new window can go in for many years of rust free trouble.
Edit: Added mention of sealant primer in case Butyl is not used. (Hadn't thought that a non-butyl sealer would be used.)
Last edited by Durango_Boy; Dec 28, 2007 at 02:06 PM.
Le Mans Master
Joined: Jan 2006
Posts: 8,319
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From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Howver I would not use por 15 without a primer over it here uless you were sure to use the old style Buytl (sp) window sealer.
The newer style epoxy sealers require a specific type of primer to bond to, anything else and youll lose the windshield for sure, I'll have to look up the name of the stuff i used and post later, but any good winshield repair shop can tell you.
Edited: because SIXFOOTER made an excellent point
cheers
tim
Last edited by sweethence; Dec 28, 2007 at 02:42 PM.
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
thats exactly what he is saying D, the por 15 when cured creates a surface that the window sealers can not bond to, ( though I think buytl could stick to anything
). Unlike other muscle cars that use a rubber seal to hold the windshield in place, the corvette windshield is bonded to the frame, if this bond is weak due to the surface not being prepped right, the windshield will leak at best, and come free at worst. Also you must be sure that the edge of the windshield where the sealer will go has been cleaned and preped as well .
for the windshield frame, after cleaning, I used this stuff as a primer to ensure a proper bond between the windshield and the frame using a eurothane sealer
CRL POWR 300 Series Urethane Pinchweld Primer
cheers
tim
). Unlike other muscle cars that use a rubber seal to hold the windshield in place, the corvette windshield is bonded to the frame, if this bond is weak due to the surface not being prepped right, the windshield will leak at best, and come free at worst. Also you must be sure that the edge of the windshield where the sealer will go has been cleaned and preped as well .for the windshield frame, after cleaning, I used this stuff as a primer to ensure a proper bond between the windshield and the frame using a eurothane sealer
CRL POWR 300 Series Urethane Pinchweld Primer
cheers
tim
Drifting
Joined: Sep 2007
Posts: 1,572
Likes: 51
From: Wichita Kansas
thats exactly what he is saying D, the por 15 when cured creates a surface that the window sealers can not bond to, ( though I think buytl could stick to anything). Unlike other muscle cars that use a rubber seal to hold the windshield in place, the corvette windshield is bonded to the frame, if this bond is weak due to the surface not being prepped right, the windshield will leak at best, and come free at worst. Also you must be sure that the edge of the windshield where the sealer will go has been cleaned and preped as well .
for the windshield frame, after cleaning, I used this stuff as a primer to ensure a proper bond between the windshield and the frame using a eurothane sealer
CRL POWR 300 Series Urethane Pinchweld Primer
cheers
tim
). Unlike other muscle cars that use a rubber seal to hold the windshield in place, the corvette windshield is bonded to the frame, if this bond is weak due to the surface not being prepped right, the windshield will leak at best, and come free at worst. Also you must be sure that the edge of the windshield where the sealer will go has been cleaned and preped as well .for the windshield frame, after cleaning, I used this stuff as a primer to ensure a proper bond between the windshield and the frame using a eurothane sealer
CRL POWR 300 Series Urethane Pinchweld Primer
cheers
tim
Very good advice. The Por-15 does need to the top coated or primer coated to the seal to stick properly. With this advice in prep that window frame will never have a problem again and the window will have a good to seal.
Drifting
Joined: Jan 2004
Posts: 1,991
Likes: 3
From: Piscataway NJ
I top coated the POR15 also. Most glass installers use a primerless urethane to set the windshield. Just be aware if you use the urethane. have nice tall bead. If you don't the glass will be lower than widshield revel moulding. The replacement glass is Thinner than the original. So "you or the installer" needs to pay attention when setting the glass.
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Le Mans Master
Joined: Jan 2006
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From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
tim
Thread Starter
Racer
Joined: Jul 2007
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From: Glasgow, Scotland
will it come of without having to remove the silver t bar part on the t bar roof thing?
Le Mans Master
Joined: Jan 2006
Posts: 8,319
Likes: 7
From: Wilmington DE, Drive it like you stole it, 68 327 4 speed coupe
Thread Starter
Racer
Joined: Jul 2007
Posts: 256
Likes: 0
From: Glasgow, Scotland