Will not penetrate new leather seats - leaves a very thin, soft shine after buffing. Looks nice. But after sitting on the seats once or twice, it is clearly seen that it is worn out and there are shiny and dull spots after that. Don't really think it does anything other than sit on the skin. The smell is excellent. Wish 3D made a car spray with a scent that smells like this - their new car interior spray sucks.