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I'm looking for a material that will expand to fill a cavity of an irregular shape, and then solidify into a permanent shape. I am not using it primarily for insulation purposes.

Polyurethane spray foam would be otherwise perfect if it were not for its stickiness, but I must be able to easily remove it afterwards without damage to other materials.

fred_dot_u
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goweon
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2 Answers2

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Fill a plastic bag with the polyurethane spray foam. The stuff expands a ton, so be careful not to burst the bag.

popham
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Reynolds Advanced Materials makes a variety of foams that are designed for exactly this purpose. Some are even automobile (flame/burning) rated.

KneadEd Massage
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