>Mike Kerr wrote:
>>
>> one problem though if it traps moisture it can give you probems with rusting
>> out the body
>> there was this house that they used some new type of foam as insolation
>> that caused all the nails to rust that held it together , it had formed some
>> sort of acid that did the damage .. Would be a bummer if you pumped foam
>> inot your car only to have it rust away..
>> But if this stuff is safe it could be used in the frame of the roaster to
>> stiffen it ...
>
>Mike is absolutely right. Though the stuff is used for just this purpose
>in new cars and therefore isn't going to produce rust or corrosion in
>and of itself, if the box members being filled aren't properly prepared
>first, you are going to have problems. I haven't seen the instruction
>for these products, and they may give specific dos and don'ts But I
>would think that all rust should be treated first with an agent such as
>Rustmort or Ospho, which will convert the rust to a stable iron oxide
>that is not reactive and will not corrode any further. Then a coating of
>some sort might be in order, like a paint or something. As I say the
>specific product may well have instructions as to how to use it in an
>older car, once it is released for consumer use. Of course as it is used
>now, during production of a new car, the situation is completely
>different.
Moisture can cause a multitude of problems, if this material is a
urethane foam (and I suspect it is) encountering moisture can adversley
affect the foam's curing, and you might possibly get a frame full of
urethane goo...
Marc Tyler
|