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Applications include: sheathing, siding-underlayment, below-grade insulation, cavity wall insulation, weather resistive barrier, and waterproofing protection board. Film-Faced Expanded-Polystyrene Board Insulation: ASTM C 578, Type XI, 5 psi (35 kPa) minimum compressive strength, maximum flame-spread and smoke-developed indexes of 25 and 450 ... ................
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