Light Weight Foam Recommendations

Question

Light Weight Foam Recommendations

boo1 (Mechanical)

(OP)

20 Jun 13 15:15

We have a rotating centrifugal fan with extruded hollow fan blades. The fan is exposed to constant salt spray. The blades are sealed at there edges with Proseal polyurethane sealant. Sometime the Proseal fails and the blades fill with debris. The debris causes fan imbalance. We wanted to try filling the blades with a light weight closed cell foam., to prevent the debris from entering the fan blades.

Does anyone have recommendation of a foam to try?

IRstuff (Aerospace) · Answer 1 · 2013-06-21 11:40:35

Perhaps something like this:
http://www.homedepot.com/p/GREAT-STUFF-16-oz-Gaps-...

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berkshire (Aeronautics) · Answer 2 · 2013-06-21 12:35:24

Try a 2 part poly urethane foam, the one part foams have a tendency not to cure in the center for several days.
http://www.bing.com/shopping/fiberglass-evercoat-f...

Measure and add by weight.
B.E.

boo1 (Mechanical) · Answer 3 · 2013-06-21 14:00:25

thanks, I was thinking the same about Greatstuff, but was scared about water absortion. The boat foam looks like the one I want to try.

IRstuff (Aerospace) · Answer 4 · 2013-06-21 15:30:50

They make a variety of foams, including one for ponds and the like:
http://greatstuff.dow.com/products/pond-and-stone/ It's supposedly usable for direct contact with water

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Light Weight Foam Recommendations