Dow PIR Thermax Sheathing - This is thermal sheathing that was used in residential construction site. This was installed where there is a high chances of fire such as the wall that an electric box is set up.
The core which is the glass-fiber reinforce PIR foam will not melt when exposed to fire. It will form a strong char which will prevent severe degradation to its core. It will also prevent flame spread.
The aluminum on each side will act as effective moisture vapor retarders.
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