Ultimately you would have to get a specification on your meterial, to find out the oxygen and helium permeability rating . talk ) 13 : 06, 5 December 2007 ( UTC)
2.
Washington was the first State to institute air barrier requirements with both a maximum material air leakage requirement and a whole building maximum air permeability rate with testing requirements for buildings six stories and higher.
3.
After manufacturing, they are O-plasma vacuum cleaned ( and / or vacuum baked ) to reach out-gassing performance similar to Teflon while reaching vacuum leak tightness ( permeability rates ) similar to FKM ( Viton ) compounds.
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