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porwolf porwolf is offline
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Join Date: May 2011
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Has anybody ever entertained the idea of filling the cavities with urethane foam. I have some experience with it and always thought of it as the perfect solution to keep water out of automobile cavitiies. Urethane foam is a closed cell product so it does not absorb any water at all. Plus, being urethane, it has excellent adhesion qualities to walls. Urethane foam comes in liquid form in various densities and final hardness. When you pour, or inject, the 2-component liquid mixture it heats up quite strongly, pressing into all crevices, and driving out any possible remaing water. I cannot imagine how water could possibly get back into the urethane filled cavities.

Seems to me a perfect solution.
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Old 01-28-2012, 03:05 PM
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