Flange support?

[Guy48065]

Installed a Champion toilet yesterday. I checked the tile floor and it was flat & even. The toilet rocked a bit during the dry fit check. I didn't see a reason for it. I used 4 thin shims around the base to get it dead level & eliminate the rocking.
The flange was about ⅜ below flush so I stacked 2 rings.
No leaks & feels solid.

My question is... Since the base is barely shimmed up off the floor can I just caulk around it and call it good, or should I stuff something under the base for more support? And what should I use - - make up some thick plaster? Grout...?
And when there's not much gap do you mash it in there with fingers or maybe squeeze it in with a pastry bag (Ziploc with the corner snipped off)?

 

[Breplum]

We use the hard translucent plastic shims. Then use a chisel to snap them from sticking out. Then translucent silicone caulk.
Never ever used plaster in my 49 years plumbing.

 

[Sponsor]

 

[Guy48065]

We use the hard translucent plastic shims. Then use a chisel to snap them from sticking out. Then translucent silicone caulk.
Never ever used plaster in my 49 years plumbing.

Probably those crazy tile guys do that...but I know it's done sometimes.

 

[Jeff H Young]

Ive had new construction where they grouted in the toilets they are rock solid and save me the time of caulking . one of my toilets apears to been grouted its on ground floor concrete slab tile floor I dont like it but its solid never had an issue

 

[Guy48065]

My previous home was built in 58 and the pink toilet on the pink tiles was probably original. It sat on a cast iron flange that was on top of the tile. That toilet hovered ½" over the floor and was set on grout & troweled off flush to the base. It was a nice finished appearance and rock solid.

I installed my upstairs toilet today and it rocked a bit side to side like yesterday's so was stabilized with the plastic shims.
It doesn't feel like it needs any additional support so I guess I'll just caulk around the base with silicone.