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View Full Version : How do you stick bits of bumper together?


Jesus-Ninja
10-03-2007, 20:28
Righto.... Not normally my thing, but here we go.

I'm happy enough spot welding bits together, slap a skim of Fibral over it, top off with some filler and sand back. Lovely :)

But plastic bumpers have always posed me a problem. Noting sticks to them. they flex, so filler and fibre-glass crack. I've seen, dare I say it, on "Pimp my ride", the guys on there hacking different bumpers to pieces and then bonding and filling them.

What products are they using? :confused:
bluedanny
10-03-2007, 21:01
on "pimp my ride" they are use fibre glass bodykits they are not as flexy as plastic bumpers!
Jesus-Ninja
10-03-2007, 21:12
on "pimp my ride" they are use fibre glass bodykits they are not as flexy as plastic bumpers!

Hmmm... I'm sure I saw them blending a bumper from one car into a bumper from another...

Maybe they were both fibreglass?
Marcos
10-03-2007, 21:31
Plastic welding?
ShawJohn
10-03-2007, 22:18
If you find out what sort of plastic they are, there is usually a solvent that can be used to melt it in to a glue like solution, you then use this glue to stick the bits back together...

See CarPC link in my sig.
lurch
11-03-2007, 20:01
you can use a 2 pack polyurathane glue.which is basically bumper glue!!
the place i work for sells it as we are a bodyshop supplier.where abouts are you?might be able to recommend somewhere to get it.
tallpaul
11-03-2007, 21:16
Hmmm... I'm sure I saw them blending a bumper from one car into a bumper from another...

Maybe they were both fibreglass?

Or, more likely, by the time the show has finished, and the 'lucky pimpee' has got his car home, the filler has cracked/ fallen out!
As you said, very few, if any, products will stick plastic bumpers together. If the two bumpers are of exactly the same type of plastic (manufacturers may name their plastics the same, but often they have slightly different compounds) then it is possible to weld them together. Otherwise, you're just going to try and bond/ glue them, with plenty of reinforcement and hope for the best.
cranky
11-03-2007, 21:18
I'm looking for the same info fella,

a couple of useful links i've found so far:

http://www.popularmechanics.com/how_to_central/automotive/2763656.html?page=1

http://www.weldguru.com/plasticrepair.html

Fillers: No idea if these are any good though :confused:

http://cgi.ebay.co.uk/BLACK-PLASTIC-BUMPER-FLEXIBLE-FILLER-CAR-BODY-REPAIR_W0QQitemZ320058477352QQihZ011QQcategoryZ309 23QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

http://cgi.ebay.co.uk/Black-Rubbery-Bumper-Automotive-Car-Body-Filler-2klo_W0QQitemZ170085960396QQihZ007QQcategoryZ30923 QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
jacks300zx
11-03-2007, 21:18
fookin drill and cable ties!!
marty_t3
12-03-2007, 09:49
fookin drill and cable ties!! :nod: gets my vote
pukkaSILVIA
18-03-2007, 17:13
fibreglass matt and resin on the back.wait til its dry.grind out a v in the front along the crack and then fill with filler
Matt_S
18-03-2007, 18:23
Gaffa Tape FTW!!!
(as modelled on my split lower lip :wack: )

http://i40.photobucket.com/albums/e223/Matt_SDMON/RD1_0439_copy.jpg
cranky
18-03-2007, 18:42
fibreglass matt and resin on the back.wait til its dry.grind out a v in the front along the crack and then fill with filler

Would using mesh to reinforce the firbeglass matt and stop the paint cracking help at all or would it make no difference?