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R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

Perma "R" Products R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation

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Is this "garage door foam" XPS or EPS foam or something else altogether?


According to their website, this is Expanded Polystyrene Foam (EPS) It is NOT Extruded Polystyrene (XPS) Foam.

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I had the same question. Extruded polystyrene and expanded polystyrene are two different foams. For whoever answered polystyrene.

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It is polystyrene foam.

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