Silicone Caulk Over Grout?
I am trying to remove grout from shower areas where floor and walls meet so I can repace it with 100% silicone. Although I have dug into all the grout and broken the connection of the floor to the walls, I am having difficulty removing all the grout. Some of it just remains stuck to the end of the tiles, leaving as much of about 1/16 inch coating of grout at the end of some tiles. I am using an oscillating tool (Rockwell SonicCrafter) and asorted hand tools. Is it necessary to completely get all of the grout off prior to applyng silicone? If I leave some grout, will the silicone stick to it?
BTW, the original contractor put non-silicone matchng caulk over the grout, which grew mold and has been deteriorating. I have mostly removed this, but the grout under it was a lot harder than I expected.