PRET's resin expertise was first directed towards the automotive industry. Due to decades of expertise with virgin and recycled materials, PRET has a resin for all plastic applications: from bumper-to-bumper and everything in-between. With more than 120 North American automotive market approvals, PRET's offerings include PA6, PA66, PP, TPO, Long-glass PP, ABS and PC/ABS. Grades For The North American Automotive Market. Below are just a few of the interior, exterior and underhood applications that PRET resins currently support.