Carnation Corn Caps are medicated plasters that are clinically proven to remove corns within a 10 day treatment period. Carnation Corn Caps Carnation Corn Caps combine a measured dose of Salicylic Acid Ointment with a soft felt corn ring to relieve pressure whilst trating the corn. Salicylic Acid loosens the intracellular cement holding hardened skin together allowing it to flake away, softening and loosening the nucleus to allow clean removal. Carnation Corn Caps have a self-adhesive strap that makes them easy to apply and hold firmly in place. A ten day treatment course is usually fully effective.