John Meeks wrote:
> Hi Folks,
>
> I've built an adapter to mount Cibie H4 lamp housings to the Vanagon
> headlight mount/adjuster setup but there is not much in the way of
> attachment options. I have the lamp housing attached to the adapter
> with some baling wire but need a bit more  backup strength.
>
> On the lamp housings (the reflector that holds the bulb) the glass is
> attached with some kind of white caulk. I'm looking for something with
> similar properties. The homebrew adapter needs to attach around
> housing the same place where the glass attaches.
>
> High temp, flexible when cold and weatherproof is what I need.  Any ideas?

I'd try the stuff they use to seal windshields.

It isn't silicone and doesn't release acetic acid and promote rust like
some silicones will.

It may be some kind of urethane but you might just want to stop at a
glass shop and see if they'll sell you some of what they use or tell you
where to get it.