OptiBond Solo Plus Unidose is a single component adhesive designed for both direct and indirect cosmetic and bonding applications. Optibond Solo Plus is 15% filled with the same 0.4 micron filler found in the Kerr Point 4 composite. Single dose solution delivery ins convenient. Optibond Solo Plus Unidose - Kerr has an etchant integrated to make applications easy. Each box contains 100 cartridges. We also carry adhesive for braces.