Scotchbond Universial Adhesive can be used in all application techniques, including Total-Etch, Self-Etch and Selective-Etch. It's ideal for both direct and indirect applications. Without any extra primer, it acts as bonding agent on all surfaces including enamel, dentin, glass ceramic, zirconia, noble and nonprecious alloys, and composites. Combined Total-Etch, Self-Etch and Selective-Etch adhesive. Consistent bond strength to both moist and dry etched dentin. Virtually no post-op sensitivity Store at room temperature for two years