Wipe the area around the rip with rubbing alcohol to eliminate dirt, dust or anything else that will interfere with the repair process.
Apply leather conditioner to the area. The conditioner softens the area and makes it easier to patch. Wait 24 hours before continuing to allow the conditioner proper time to work.
Cut the leather patch included in the kit in a circular shape slightly larger than the rip. If the rip is large enough, insert the patch inside the rip and patch from the inside out.
Spread repair compound on the patch where it touches the leather. Press firmly to create a tight seal. Wait 10 to 15 minutes for it to dry. For excessively deep or large rips, you may need to apply multiple layers of repair compound. Wait for each layer to dry before applying another.
Wipe down the area with rubbing alcohol to remove excess compound. Do not wipe too hard or repeatedly or you risk the patch peeling.
Create a color that matches your leather out of the compound supplied with the leather repair kit. Apply the compound in several thin layers, as opposed to one thick layer, which will flake and appear jagged.