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Johns Mansville 1200 industrial board
Old 14th December 2019
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Johns Mansville 1200 industrial board

Anyone have any experience with this product,
Johns Manville MinWool-1200 Industrial Board 1280 4" (102mm) density 8 pcf (128 kg/m^3). This stuff comes in 48"x60" sheets 4" thick.
I checked and the numbers looked similar to O.C. 703
I just wondered if anyone had any thoughts or opinions on this stuff.
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