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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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One answer on the community board says it has shiny metallic facing and another a poly face. What is the difference and what does this have?


Both are polyethylene films. The metallic facing is the same as the printed side except for addition of aluminum.

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