THRUSH STOP creates an antiseptic barrier between thrush and healthy tissue by actually bonding to the hoof protein for long lasting protection. THRUSH STOP is not caustic like other commercial preparations that can mummify and stunt new horn growth. THRUSH STOP is also safe to use. It contains no formaldehyde (formalin) or other cancer causing agents. THRUSH STOP can also be used before applying silicone and sole pads to reduce the possibility of reinfection. And it is also effective against stubborn Candida (yeast) infections.