Yes, applying a bead of silicone caulk around the exterior base of a toilet is standard practice for aesthetic reasons and to prevent mop water or dirt from getting underneath the ceramic. However, building codes and professional plumbers recommend leaving a small 1-to-2-inch gap uncaulked at the back of the base. This gap acts as a crucial weep hole so that if the internal wax ring ever fails, water escapes openly onto the floor rather than getting trapped underneath to rot your subfloor. Verification: Inspect the caulked perimeter to ensure a clean seal while leaving the rear weep gap open.
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