PBT (polybutylene terephthalate) offers many of the same properties as Nylon, however, PBT absorbs very little water; allowing PBT to hold its stiffness in wet applications. PBT is an economical substitute for Nylon 6.6 or 6.12 in many applications, and has better abrasion resistance than polypropylene or polystyrene. PBT also has excellent bend recovery, excellent solvent resistance and excellent oxidation resistance at high temperatures. PBT has very good resistance to sunlight.