Air Barrier NS-A250-HP is an elastomeric coating for Industrial, Commercial and Residential Air barrier applications. Air Barrier NS-A250-HP has an A1 classification for wind load. It protects the substrate from air-leakage and moisture while remaining breathable, thus allowing for any trapped moisture or condensation to escape. Air Barrier NS-A250-HP is UV stable, eco-friendly, and safe to use. It is a highly versatile elastomeric coating that is cold-applied using a spray system. With its unsurpassed ability to expand and contract, it can easily withstand all weather conditions.