PPG secures heated windshield contract for Bell 525 Relentless helicopter MRO Business Today 03:06 PPG secures heated windshield contract for Bell 525 Relentless helicopter PPG Industries, Inc., a global supplier of paints, coatings, specialty materials, and fiberglass has received a contract from Bell Helicopter to produce heated pilot and co-pilot windshields for the Bell 525 Relentless commercial helicopter. Th Share this Share on FacebookTweet on TwitterPlus on Google+