Re: Bonding polypropylene?
 

Will a cheap one do though? Do you not need a specific temperature?

Re: Bonding polypropylene?
 

Depends how good a joint you need, headlights probably aren't massively stressed if there are a few mounting points.
You could also try solvent welding.

Or actually I know a guy who's a wizard at it, does body panels up here as a bit of a sideline. Could post your lamp?

Re: Bonding polypropylene?
 

There are adhesives that will do it I did a search for "bond polypropelene" for example 3M Scotchweld 4693H, link below for amazon at £15.99

http://www.google.co.uk/url?sa=t&sou...PcFb3tiWP1PDpA

Re: Bonding polypropylene?
 

Problem is that stuff is elastomeric so will be flexible. Might have better shear strength but I don't want to be cutting corners. I've put in an offer for new ones but if I don't get em I'll plastic weld them.

Thanks again org, always got answers.

Re: Bonding polypropylene?
 

Can you not make a 'mechanical' repair with e.g. a steel bracket and some fasteners?

Re: Bonding polypropylene?
 

Not much clearance around the lug. Thought about reinforcing it with a paperclip or the like but am after some new ones now which I'll hopefully get.

Re: Bonding polypropylene?
 

Just as an aside, whenever I've really had to try to fix something similar I try to use a loop of lock-wire through some holes to give it mechanical strength. You can either drill or sometimes use heated wire to melt a hole. Lock-wire is stainless and nice and flexible, paper clips are usually rather stiff for this sort of trick, thin copper wire can be used. Then build up with Araldite around it if there's space.

Polythene and polypropylene can be tricky to get a successful bond, as you all know. The wire can give the epoxy something to get hold of.