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Old 02-12-2009, 11:11 PM   #13 (permalink)
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Join Date: Jan 2008
Location: Sacramento, CA
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Owens-Corning Foamular is extruded polystyrene. Can be bought in sheets of varying thicknesses. It's the pink stuff. Almost impossible to buy directly here in Cali--too warm. But you could probably find it in any northern state or country at whatever major home improvement box-store retailer of your choice.
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