Radon Permittivity (Diffusion Coefficient): Maximum 1.50 x 10⁻⁸ m²/s∙d in accordance with ISO/TS 11665, Method C (K124/02/95).
Methane Permeability (Gas Transmission Rate): Maximum 40 mL/m²•day in accordance with ASTM D1434.
Water Vapour Permeance: Maximum retained performance of 0.57 ng/Pa∙s∙m² (0.010 Perm) and classified as vapour impermeable in accordance with ASTM E154 and ASTM F1249.
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