Have used Griot products for many years but have never had a car with leather seats. I purchased an old preserved Lincoln Town Car with a leather interior that was in very good condition with minimal drying cracks. The idea is to apply this product, let it set, and continue to "layer" it until the skin is hydrated and no longer absorbs the anti-aging product. In my case it took three layers (each application was left overnight) and the skin was perfectly hydrated, soft and the cracks looked better. Also used it on leather steering wheel cover and it worked too.