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Ensure the liquid leather matches perfectly. Clean your leather seats. Apply diluted liquid leather with a sponge to worn areas. Add a full-strength coat to the entire seat. Condition the leather after it dries.
You can send a small swatch of the leather (there will be extra underneath the seat) to the liquid leather distributor to find an exact match. Or, provide the color code or name to the distributor to make sure you get the right shade. Liquid leather is a combination filler and adhesive compound that can be purchased online and in many auto parts and upholstery stores. Test the product in an inconspicuous spot before applying it to the rest of the seat. Adjust the color with the provided toner or exchange it for a better match, if necessary. Sweep any any debris or crumbs, then put a small amount of leather cleaner on a soft cloth or rag. Scrub the seats with the cloth to remove dirt and grime. Then, put a mild solvent, like 50% isopropyl alcohol, on a clean rag and wipe down the seats to remove any residue. Allow the seats to dry completely before moving on. Dilute the liquid leather with water by 30% before rubbing it into cracks and creases. Wipe off the seat with a damp cloth so that the product is removed from the good leather and left in the cracks. Let the liquid leather dry then apply another coat to strengthen the color or build up cracks, if necessary. Once the worn areas have dried, apply an even coat of liquid leather to the entire seat. This will ensure that the whole seat is the same color and will make repaired areas less noticeable. Once the liquid leather has dried completely, you should condition the leather to prevent it from cracking further. Use a leather conditioner and apply it with a soft cloth to the entire seat. Allow it to dry fully before sitting on the seat.