an hydraulic brake hose such as for automotive applications is formed of an epdm elastomer core tube and one or more additional tube layers , each formed of such terpolymer compounded without processing oils and one or more interlying reinforcing layers of nonwater - base adhesive coated polyvinyl alcohol fibers . the absence of water from the reinforcing fibers provides thennal stability to the reinforcing layers , and the absence of compounding oil from the epdm terpolymers also provides high temperature properties for the hose .