There are many types of leather dye products! The correct product will depend on the leather finish. Most automotive leather finishes will require a water-based product that can hold dye pigments. This is applied with a Hvlp air spray gun and dried in thin layers. This application is very important and must be done correctly or the finish will be too thick. If the finish is too thick it will not flex and can fail prematurely. It will also not feel soft and flexible. We do not recommend trying this at home. It takes many years to understand the very best method for application to automotive seats.