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Old 02-19-2006, 02:44 PM   #1
wxwax OP
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Best glue for metal to plastic?

I have a stressed joint that mates plastic to metal. I managed to break it.

What's the best glue to use for repair? By best, I mean most likely to withstand regular stressing.
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Old 02-19-2006, 02:51 PM   #2
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Quote:
Originally Posted by wxwax
I have a stressed joint that mates plastic to metal. I managed to break it.

What's the best glue to use for repair? By best, I mean most likely to withstand regular stressing.
I like the 3M automotive trim adhesive. It's the crap they use to keep molding on the sides of your car. If the metal is bare, consider painting it first. Bare metal and adhesives are problematic because water migrates along the metal adhesive interface ultimately causing the bond to fail.
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Old 02-19-2006, 03:03 PM   #3
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Quote:
Originally Posted by ADVman
I like the 3M automotive trim adhesive. It's the crap they use to keep molding on the sides of your car. If the metal is bare, consider painting it first. Bare metal and adhesives are problematic because water migrates along the metal adhesive interface ultimately causing the bond to fail.
Thanks. This thing won't get really wet. But it will be subjected to a lot of twisting stress.
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Old 02-19-2006, 03:09 PM   #4
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Polyurethane?

or something from 3M...........

http://products3.3m.com/catalog/us/e...er/output_html
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Old 02-19-2006, 03:46 PM   #5
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Barge cement!

Been using it for years, a leathersmith friend turned me on to it. Shoemakers all use it, they buy it in gallons.

'The Original Barge Cement; Cobbler's 1st choice for gluing rubber and leather. Used in the motion picture industry by grips and set decoraters.

All Purpose Cement for rubber, wood, leather, glass, cork, metal, plastic, plaster, paper, concrete, etc.'

You can get it at hardware stores now, in the olden daze it was pro leather shops only, it's a contact type rubber cement.



Sand both pieces you want to glue or rough them up for some 'tooth' for the glue. Apply Barge cement to both pieces and let it sit awhile then stick them together (NO second chances!) and clamp them or hit them with a mallet like the shoemakers do if you really want a nice joint.
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Old 02-19-2006, 03:54 PM   #6
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JB Weld rox!
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Old 02-19-2006, 04:02 PM   #7
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Gorilla Glue or its equivalent. Supposed to be some badass stuff.
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Old 02-19-2006, 04:48 PM   #8
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Quote:
Originally Posted by Fluorescentbrown
Gorilla Glue or its equivalent. Supposed to be some badass stuff.
I've heard more of the same... No exp. with it though.
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Old 02-19-2006, 05:00 PM   #9
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Quote:
Originally Posted by wxwax
I have a stressed joint that mates plastic to metal. I managed to break it.

What's the best glue to use for repair? By best, I mean most likely to withstand regular stressing.
Marine grade epoxy
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Old 02-19-2006, 05:04 PM   #10
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Quote:
Originally Posted by Fluorescentbrown
Gorilla Glue or its equivalent. Supposed to be some badass stuff.
Some people call it 'Sir'.
Yep, it is.
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Old 02-19-2006, 05:07 PM   #11
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Quote:
Originally Posted by rick danger
Marine grade epoxy
What's the difference between 'Marine Grade' and the magnum, elite, ultra, superest stuff in small tubes at auto parts stores...besides the marine price?
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Old 02-19-2006, 05:11 PM   #12
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gorilla glue expands as it sets up,it will move stuff unless clamped heavily.

chemrex CX47
used to put truck bodies together and hold windows into highrises.
moisture cured,so you can mist it with water to speed up setting time.
some incredibly strong shit,don't put it where you don't want it once it dries.
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Old 02-19-2006, 05:15 PM   #13
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Plastic Weld or Plastic Steel Epoxy (depending on type of plastic and steel).
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Old 02-19-2006, 07:35 PM   #14
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Does the joint vibrate? If it does, I have had success with Sikkaflex urethane chaulk. It allows give under variable loading. If the patch is too small you may have to rivet.

Find it in hardware stores in building materials.
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Old 02-19-2006, 08:21 PM   #15
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ALL depends on the "type" of plastic to be bonded, you will have limited success without mechanical retainers.
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