Many of us like to seal our preps with our bonding resin to prevent post op sensitivity and to increase retention of bonded restorations and restorations cemented with RMGI's. This is my protocol.
Over time the protocol for bonding has evolved. Originally we were cleaning the prep with alcohol, then adding Surpass 1,2,3 and curing. Then we added co-curing Titan flowable to speed up the procedure, toughen up the bond, and to eliminate that radio opaque line under the restoration. Then the alcohol used as a cleaner was replaced with Clean and Boost, which eventually replaced Surpass 1. Now we have Bond Saver D to help with desensitizing and to protect the integrity of the dentin bond. Bulk filling and pulse curing with Exquisite have also evolved.
The original protocol with only Surpass 1,2,3 including co-curing the flowable gave fabulous results. So that's a great way to go. If you want to be "cutting edge", then the protocol outlined above is available for you.