SensiShield contains the active ingredient Novamin. When in the mouth, Novamin is activated by water in the saliva and the mouth's PH to provide the chemical constituents which re-calcify tooth enamel and dentine.
The re-calcification process is speeded up by a higher concentration of Calcium and Phosphorus in the paste. These elements are found naturally in saliva and help repair the tooth surface when damaged by acids.
According to the company, patients notice reduction of tooth sensitivity in about 7 days. It also comes in a pleasant peppermint flavour.