IonoStar Plus Glass Ionomer Restorative - A2 Capsules, 20/Pk. For cavities, base/liner, core buildup material and extended fissure sealing. Fast-setting, nonsticky, can be applied easily with direct-application capsules. Fast setting time of only 2 minutes from placement of the filling. Glass ionomer material with tooth-like fluorescence. High level of fluoride release. Capsule design reaches smaller cavities and difficult-to access areas of the mouth.