Polyurethane foam injection.

[Rohorn]

Hi....Is there a grade of polyurethane foam which will not take up water? I understand that the stuff found in hardware stores is OK for buildings but not boats. Does it have a generic name? Cheers...R

<hr width=100% size=1>

 

[PaulJ]

I can't answer your question but I know a man who probably can. Have a look at his website and then give him a ring......www.insulationsprayfoam.co.uk

<hr width=100% size=1>

 

[oldsaltoz]

G'day Roger,

Look for "Closed Cell Foam" it will soak up moisture.

Hope this helps



<hr width=100% size=1> Old Salt Oz /forums/images/icons/cool.gif Growing old is unavoidable. However, growing up is still optional.

 

[ex-Gladys]

...he means "not soak up moisture". Foams are either Open Cell or Closed cell. SPonges are Open cell

<hr width=100% size=1>Larry Botheras

Anderson 26 "Amber"

 

[vyv_cox]

The PU foam used to provide buoyancy in Sadlers and Etaps, and maybe others, are closed-cell engineering foams. They are applied under specific conditions of temperature, mixing, pressure, etc that are normally beyond the scope of the DIY builder. Also, they give off fumes of either methyl di-isocyanate or toluol di-isocyanate when curing, not something you want to breathe in.
Single pack building foams (in aerosol cans) have some closed-cell content but a good deal of open cell also. They are OK for filling gaps in walls, and maybe in boats too, but they definitely soak up water.
Two-pack P.U. foams that were (and maybe still are) supplied by GRP retailers, such as Glasplies and Strand, are not water resistant in the medium term. I speak as one who has had to chip out the stuff poured into the ends of canoes when it became waterlogged.



<hr width=100% size=1>

 

[Rohorn]

Hi people...many thanks for your comments. In fact, as luck would have it, the thread "Water in keel" which follows is very much akin to my situation, and it looks as if my foam idea is perhaps not the way to go. I contacted the people you recommended, but I'm sure now the solution must be in some poured in expoxy stuff. I'll describe exactly what the problem is in a reply to that thread.
Thanks again...Roger.

<hr width=100% size=1>