Durasole forms a living pad. The most effective sole hardener in the industry. Used and recommended by many knowledgeable farriers and veterinarians, Durasole has helped keep horses sound everywhere from racetracks, show rings and event courses to rodeo arenas, endurance trails and polo fields:  the product is literally without peer. Durasole is highly concentrated and formulated to be used in small quantities. A few drops of Durasole on your horse's sole can make a big difference to your horse.  Active Ingredients 12% formalin, .01% tannic acid, .08% povidone-iodine, .04% gentian violet

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