PPG Aerospace is introducing new materials for improved aircraft windshields and windows. For the Airbus A320 family of airliners, the French company has developed a new windshield featuring two new PRC sealants used to improve moisture resistance: PR-2060 polyurethane, which has a low moisture vapor transmission rate, has been added as an internal sealant behind the Z-retainer (a part that holds plies together); and PR-1425CF chromate-free sealant has replaced PR-1425 as the outboard moisture seal for the windshields it has a faster cure rate and is less environmentally harmful.
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