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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

4.5
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I see this is Formaldehyde Free. What about other safety factors for interior, closed space use? Does it off-gas or contain HFC, CFC or HCFC?