This products is made of special formula to make a long-lasting, highly visible mark on cattle, swine, sheep, pig, horse or any livestock. Extremely fast drying, resists fading. Once dry, is fully weatherproof and waterproof. Also ideal for marking synchronized cows, dry cows, medicated animals, freshening dates; identifying newborns and dams; sorting animals, or any other marking needs. Various colors of red, blue, green, violet and so on are available.