DenTastic Uno and Uno Duo are hydrophilic bonding materials for an incredible dual-cure result. Use Uno resin and acetone solvent in conjunction with the catalyst Duo. DenTastic Uno-Duo is the simplest dual cure adhesive available and is the top rated 5th generation adhesive for use with self-cure and dual-cure core materials. To use, simply mix 2 drops of Uno + 1 drop Duo for any direct or indirect restoration, such as crowns, inlays, bonded amalgams, or whenever self-cure or dual cure capability is indicated.