Yes and no.
Andy’s Seats had Leather Revive from Furniture Clinic for good measure.
But it has to be applied after the old sealant has been chemically removed in the first stage. It won’t penetrate the leather otherwise.
You wouldn’t remove the old sealant unless you were re-dyeing the seats
I am assured by Furniture Clinic that any product that claims to soften leather by sitting on top of the sealant is false. The sealant is there on all seats to stop anything penetrating.
The first stage is very aggressive and removes not only the sealant but some of the original dye too.