... vapor-permeable , chemically inert, non-shedding ,UV-resistant ,temperature-resistant .Less expensive seal designs and less housing material are ... . protective vents has been widely used in protective automotive electronics unit or control module, Vents allow rapid exchange of ... 4 rates ,IP65, IP67, IP68, IP69 protection class,, in line with GB4208-2008/IEC60529: 2001 "Degrees of protection provided by ...