Shapley's No.2 Heavy Oil is used for a more intensive treatment. When a dry climate or arena dust takes its toll on your horse's skin and hair, it's time to restore depleted natural coat oils with No.2 Heavy Oil. Its deep conditioning action is especially good for restoring luster to sun-bleached manes and tails and to the coat after body clipping. To achieve optimal benefit, heat the bottle in warm water before working the oil in with your fingers. The longer you leave it on your horse, the better the results.