The Optimus drywall corner reinforcement from CertainTeed has excellent impact resistance and its paper surface is perfect for applying paint and textures. It gives crisp, sharp lines without ridges and won't blister, bubble, or edge crack. Also, corners will not separate from wall or dent. The corner reinforcement withstands significant shifting due to lumber drying, settling, humidity and temperature differences. The product is made with damage-proof paper and is 8' long.