Remove dirt or grease and oil stains for a 4-inch radius around the hole, using spirits. Pour alcohol into a shallow saucer and dip a large, soft cloth into it until moist. Wipe moist cloth over the couch to clean the surface area around the gap. Dry the area completely with a hair dryer on the low. Rub a piece of fine sandpaper grain around the hole to scuff leather material so that the color will grip the leather better. Wipe the smaller particles left with glue using a damp cloth. Wipe the area again with a hairdryer.
Since a modern leather sectional can take a lot out of the bank account, replacing it with a whole new piece is not possible every time a new damage occurs. Unless you lock the sofa away from all human and pets contact leather material is susceptible to damage and wear. Leaving the holes rectified can result in damaged area enlarging. These holes may be repaired with easy-to-use kits.
Gauge the width and length of the hole with a ruler. Tuck this piece of fabric behind the hole, push it in with your finger and smooth all bumps and wrinkles to ensure a flat surface. Dip a toothpick into the leather glue and knock it between leather material and cloth