Universal Primer is a 2 part dual cure system that can be used in total-etch, self-etch or selective-etch technique. It is recommended for the clinician who prefers to not light-cure under indirect restorations. All-Bond 3 is also a 2 part dual cure system but only can be used in total-etch mode. You may use All-Bond 3 Resin with either of the two adhesives for radiopacity to outline the restoration and reduce the risk of misdiagnosing caries.