How to determine what material was used?

'68 Coronet R/T

'68 Coronet R/T

Oldtimer
I need to repair some bumpers for a 1998 Chrysler Town and Country van. Both have damage to them and need to be repaired but I am not certain what material I am working with here.
Is there a quick way to tell if this is ABS, Urethane, SMC, etc?
 
Look on the inside of the bumper. It should actually say inside there someplace. It is part of the molding, and not on any type of sticker.

Aaron
 
I found the Chrysler logo and part number molded into the front bumper and the only thing that might be a clue is this: >TEO<
Sanded off some paint on the rear bumper and the material is Black in color.
 
Any recommendation on adhesion promoter?
Also, will this TEO material soften and relax with heat? The rear bumper has a crease that formed on top from a previous bump it took and then somebody painted over it with rattle can white.
I know nothing of working with this type of material so I appreciate the help.
 
Yes, I copied that chart and saved it on my computer.
Which is the preferred method of repair on these bumpers? Plastic welding or the epoxy resin mixes? Looks like both will set me back about the same money.
 
cracks or tears or dents distortions? Anytime you're working with a plastic that's torn or cracked that also welds good you're best off welding and finishing with repair material.
 
Thanks Bob.
I am going to plastic weld the cracks and then fill/skim with the 2 part epoxy. Sand the repair with 80 on the DA followed by 180 to feather. At that point I plan to scuff and clean the rest of the bumper, spray adhesion promoter on the bare plastic areas, then after flash shoot some SPI 2k primer and follow in the normal painting procedure.
Does this sound like a plan or should I add a coat of epoxy before I shoot the 2k?
 
I would use all epoxy primer for better flexibility and chip resistance but it may take longer-less build. You'll need adhesion promoter for the repair material also so make sure to follow the supplier's tech sheet. Flash times on the promoter is also critical. Waterborne wax and grease remover is your friend when working with these plastic parts.
 
Using epoxy on these types of bumpers means that you don't have to worry about the adhesion of repair materials to the substrate, since they will be applied to the epoxy. If I have the time, that is the preferred method, to use promoter, then 2 coats of unreduced epoxy. This also allows the use of materials like Evercoat Poly-Flex 411 as a last coat to feather out the repair.
 
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