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Posted by Goedjn on January 30, 2007, 12:38 pm
wrote:
>zxcvbob wrote:
>> m Ransley wrote:
>>
>>> Will epoxy bond to the plastic top of a car radiator. Mine is getting a
>>> crack. I know replace it, but for now I was hoping epoxy or silicone
>>> sealant might work.
>>>
>>
>>
>> I don't know, but you need to drill a little hole at the end of the
>> crack first to relieve the strain so the crack doesn't keep growing.
>>
>> If you use epoxy, get the slow-set rather than the 5-minute kind.
>>
>> Bob
>
>I'd rough it up first with some coarse sandpaper, too. Some plastics
>are just hard for any adhesive to stick to, so give it some tooth to
>give it a fighting chance. I'd probably try JB-Welsd as I've had good
>luck with it other places that it probably shouldn't have worked.
>
>I seriously doubt silicone will hold up, your rad. is probably under at
>least 16 PSI.
>
See if you can find a recycling number on it, to tell you what
kind of plastic it is. The drill the ends of the crack to keep
it from running, use a hot nail or an appropriate solvent cement
to weld it back together. THEN put a patch over it with more
glue, solvent and/or epoxy, and wrap the entire thing tightly
with copper wire.
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