It will likely take some tape to hold the cover in place till the silicone sets up.
How to cover holes in wall tiles.
Using a putty knife you are going to apply the resin to the hole.
It s important to use as much ceramic tile filler as the hole will allow.
Press on the hole firmly with a putty knife and wipe off excess caulk using a wet sponge.
Install a soap holder or face washer ring over the holes to hide them.
This will be used to patch the holes in the tiles.
Stick a piece of fiberglass wall repair tape over the hole.
Make sure to let the entire filler dry.
Cover golf ball sized or smaller holes with repair tape and joint compound.
It has carbide grit embedded in the rim that allows it to cut into vitreous tile.
Size will work for most applications but measure your valves to make sure.
After that scoop up some joint compound on a putty knife and smooth it over the tape.
Then let it dry.
And you re correct replacing tiles or grouting up the holes will look exactly what it is.
Use tile stickers to cover the hole and create a pattern on the wall.
Mix together a small amount of polyester resin and hardener.
Add the joint compound in thin layers letting it dry for 2 4 hours between coats.
Measure the size of your tile and go online to look for a design that will match the size of your tile.
Ceramic tile hole saw from about 10 for individual bits to about 50 for kits.
When using silicone caulk it is best to use one that is the same color as the tile.
Follow the manufacturer s instructions to determine the amount of hardener to add as.
You want to fill the hole entirely and get the patch level to the shower or tub wall.
The easiest and neatest method is to buy a 1 1 4 in.