NSL Aerospace pioneered the aerospace industry's first chemical PMAs, launching its line of FAA-approved sealant alternatives in 2008. NSL PMA Sealants are engineered as drop-in replacements for industry-standard PRC and PPG sealants — same performance, same specifications, fully approved for use across major aircraft platforms. As non-critical parts, they let MROs, airlines, and OEMs sidestep the long lead times and premium pricing of standard OEM channels without compromising on quality or compliance. Backed by NSL's AS9100, ISO 9001:2015, NADCAP, and ASA-100 certifications, every PMA sealant meets the same rigorous standards the aerospace industry demands.