A flexible membrane with low permeability to fluids or gases. · Capable of permitting relative motion between a stationary and a moving member while maintaining a separation of the two media on either side and may maintain a pressure differential between the two media · Often mechanically fastened for weather stripping · One to four plies of 9.7 oz polyester fabric · Premium grade neoprene · ASTM Grade (D2000 : 2BC714A14B14E014E034)
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