Re: What glue to use to fix plastic grill
[Re: 9 Sec Phill]
#277369
04/04/09 10:38 PM
04/04/09 10:38 PM
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Joined: Jan 2003
Posts: 18,416 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
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3M has quite a few products that do work well. Here is a fix that I copied from here a while back.
Start with 100% pure Acetone, buy a gallon. Pour an ounce or so intp a glass jar (small open mouth jar). Take a scrap grill and using something sharp, scrape off peelings (like pencil shavings size) into the jar of acetone. Put allot of shavings in, the acetone will gradually melt the plastic into a goo. Add enough plastic until the goo reaches toothpaste consistancy. Once you have a good batch melted put the lid on the jar tightly and set it aside. Now, prep your grill as normal, V out cracks on both sides, etc. Use clamps near the joint to alightn the two sides flush and parralell. Smear on some plastic goo, leave it crowned up over the crack like a regular weld looks, let it cure overnight. Sand to flush the next day, fill any pinholes with JB Weld. The crack will practically dissapear at this point, paint as normal
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Re: What glue to use to fix plastic grill
[Re: etek]
#277372
04/04/09 11:01 PM
04/04/09 11:01 PM
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Joined: Jan 2008
Posts: 2,592 None
71rm23
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master
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Re: What glue to use to fix plastic grill
[Re: etek]
#277373
04/04/09 11:03 PM
04/04/09 11:03 PM
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Joined: Jan 2003
Posts: 18,416 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
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I Live Here
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Quote:
That's interesting...or you could just use some fibreglass-filled bondo.
That most likely will not work the best. The above mentioned repairs do work as the bonding agent penetrates the repair pieces and becomes one again.
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Re: What glue to use to fix plastic grill
[Re: NITROUSN]
#277374
04/04/09 11:24 PM
04/04/09 11:24 PM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
3M has quite a few products that do work well. Here is a fix that I copied from here a while back.
Start with 100% pure Acetone, buy a gallon. Pour an ounce or so intp a glass jar (small open mouth jar). Take a scrap grill and using something sharp, scrape off peelings (like pencil shavings size) into the jar of acetone. Put allot of shavings in, the acetone will gradually melt the plastic into a goo. Add enough plastic until the goo reaches toothpaste consistancy. Once you have a good batch melted put the lid on the jar tightly and set it aside. Now, prep your grill as normal, V out cracks on both sides, etc. Use clamps near the joint to alightn the two sides flush and parralell. Smear on some plastic goo, leave it crowned up over the crack like a regular weld looks, let it cure overnight. Sand to flush the next day, fill any pinholes with JB Weld. The crack will practically dissapear at this point, paint as normal
Funny the guy that wrote that all out posted directly below it & got no credit for it... Thanks Scott!!
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Re: What glue to use to fix plastic grill
[Re: 1_WILD_RT]
#277375
04/04/09 11:48 PM
04/04/09 11:48 PM
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Joined: Jan 2003
Posts: 18,416 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,416
UPPER MICHIGAN, MARQUETTE COUN...
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Quote:
Quote:
3M has quite a few products that do work well. Here is a fix that I copied from here a while back.
Start with 100% pure Acetone, buy a gallon. Pour an ounce or so intp a glass jar (small open mouth jar). Take a scrap grill and using something sharp, scrape off peelings (like pencil shavings size) into the jar of acetone. Put allot of shavings in, the acetone will gradually melt the plastic into a goo. Add enough plastic until the goo reaches toothpaste consistancy. Once you have a good batch melted put the lid on the jar tightly and set it aside. Now, prep your grill as normal, V out cracks on both sides, etc. Use clamps near the joint to alightn the two sides flush and parralell. Smear on some plastic goo, leave it crowned up over the crack like a regular weld looks, let it cure overnight. Sand to flush the next day, fill any pinholes with JB Weld. The crack will practically dissapear at this point, paint as normal
Funny the guy that wrote that all out posted directly below it & got no credit for it... Thanks Scott!!
Like I said I read and saved it here. If Scott was the one than I agree props to him.
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Re: What glue to use to fix plastic grill
[Re: ScottSmith_Harms]
#277379
04/05/09 10:53 AM
04/05/09 10:53 AM
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Joined: Oct 2007
Posts: 2,886 US of A
A38s!
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US of A
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Scott do you have any repaired area photos? I'd consider trying this on a 75 RR grille. The breaks are, thankfully, not on a butted corner, but along the flat stock.
Last edited by Chief-Kikerdown; 04/05/09 10:54 AM.
WANTED: Your 71-78 Late B-body sedan parts! Police or Civilian.
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Re: What glue to use to fix plastic grill
[Re: etek]
#277383
04/05/09 09:08 PM
04/05/09 09:08 PM
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Joined: Jan 2003
Posts: 2,766 Appleton, Wisconsin
rtmike
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OR use JB Weld if your proper educated in redneck like myself!
Its not primer its perma gray.
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Re: What glue to use to fix plastic grill
[Re: Barnabas_Kriss]
#277385
04/06/09 01:45 AM
04/06/09 01:45 AM
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Joined: Feb 2005
Posts: 1,612 Vista, California
ChickMaggot
top fuel
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top fuel
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Vista, California
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I fixed a '74 Duster grille (usual cracked mounting legs) using this method, as well. Worked like a charm. Just make sure you let the repairs dry long enough before sanding. The tip didn't say anything about the ratio of acetone vs shavings and I think my "putty" was a little too wet when I applied it. After letting it dry overnight, I found that it wasn't real solid below the surface when I started sanding. For good measure, I let the repair dry for another 5-7 days before I attempted sanding again. Once primed, the repair disappeared and it appears rock solid. Heck of a tip.
You can lead a gift horse to water, but you can't look in his mouth.
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Re: What glue to use to fix plastic grill
[Re: ChickMaggot]
#277386
04/06/09 02:15 AM
04/06/09 02:15 AM
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Joined: Jan 2003
Posts: 42,714 Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
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Posts: 42,714
Spokane Washington
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Quote:
I fixed a '74 Duster grille (usual cracked mounting legs) using this method, as well. Worked like a charm.
Just make sure you let the repairs dry long enough before sanding. The tip didn't say anything about the ratio of acetone vs shavings and I think my "putty" was a little too wet when I applied it. After letting it dry overnight, I found that it wasn't real solid below the surface when I started sanding. For good measure, I let the repair dry for another 5-7 days before I attempted sanding again. Once primed, the repair disappeared and it appears rock solid. Heck of a tip.
Actually I did address that, but in a subsequent post on the thread linked above
Quote:
The flash off = The MEK/Acetone will evaporate from the melted plastic. Time varies with the initial mixture, temperature, and other environmental variables.
Bottom line, one day, 3 days, a week, you'll know when it's ready to sand when the plastic returns to a hardened state, if it's not fully cured it can gum up while being sanded.
When you break down ABS this way it does change it's chemical composition somewhat, it will lose some of it's "stiff" properties and stay just a tad to the flexible side (a good thing when fixing cracked/stressed areas) so don't expect it to return to a rock hard state, just close to it.
Also keep in mind that the glueing or welding portion of a plastic repair job is the easy part, the real, skill, time, and effort falls into the sculpting, sanding, priming, painting, etc. Just like body work in miniature. Practice, practice, practice..
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Re: What glue to use to fix plastic grill
[Re: ScottSmith_Harms]
#277387
04/06/09 08:15 AM
04/06/09 08:15 AM
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Joined: Jul 2007
Posts: 3,712 Sacramento, Ca
Darius
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Sacramento, Ca
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If you know for sure you have a piece made with ABS you can buy a can of ABS glue at the Depot or Lowes in the plumbing dept for a few $. Not any more than you will pay for a pint of MEK or Acetone and you don't have to find a piece of scrap ABS to melt down. It all works the same way drain and waste pipes are glued at their joints. My GTX grill has a small raised "ABS" identifier on the back of it.
Driving modern convenience in classic beauty
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