- Known world wide for its ability to soften even cardboard hard leather. It is a complex blend of animal proteins, collagens, with absolutely no oil fillers of any kind. Totally unlike all other leather products, it will not stain or discolor leather. It is perfectly safe for equestrian use! Simply spray or wipe onto the surface and massage into the leather with your hands. Allow for it be absorbed into the fibers. Rejuvenator has a unique capillary action which forces proteins into the leather and dirt out! Repeated use will keep leather in tip top shape. Use to condition and preserve all your leather cars, saddles, tack, furniture, motorcycle leather and even apparel. Prestine Clean is the perfect cleaner to use after each application of Rejuvenator to remove the displaced impurities on the surface of the leather.