Polyurethane foam water absorption

Ike,

nice post! I fully concur.

Originally Posted by poleguy

???? .......... Have you experience with boat construction ? Do your boats naturally leak ? .

LOL.....

yes to the first, no to the second question, never. have a look at my Gallery...

The rest is not worth to comment further than Teddy did already.

Originally Posted by Herman

I do not agree.

A compartiment, closed completely in sufficiently thick polyester (yes, even polyester, Richard) can survive without taking unacceptable amounts of moisture during the life span of the product. (30 years?)

Adhesion of the PU foam is not a problem. It adheres to about anything. If you break it (and yes, it will break if loaded dynamically) it will show PU on both surfaces.

A important condition, not often found you must confess!

I know it bonds good, but I know as good that it brakes easily under vibration, or when the formulation or mix was less than perfect (Ike has pointed the exotherm probs out), and then it is less than helpful.

Regards
Richard