You cut the old silicone away with suitable tool and clean the area. Then you install new silicone meant for such wet shower location (read: anti-mold compound included).
Silicone is the correct material there.
See for example:
[https://www.youtube.com/watch?v=HiujAReaNRk](https://www.youtube.com/watch?v=HiujAReaNRk)
New silicon caulk and regular cleaning will help reduce the re-molding.
There is no "one and done" fix for an area that gathers water like that other than a complete redesign.
Use a bath grade silicone. I suggest a silicone type 1. Every silicone in store will have the silicone type in fine print on it usually by itself near the top on the back. I've used type 2 silicones in bathrooms and it has always yellowed the next day due to the chemical compounds of what make up silicone 2 and the humidity left in the air.
https://www.homedepot.com/p/Husky-3-in-1-Caulk-Tool-CT31-HKY/317831769?source=shoppingads&locale=en-US&pla&mtc=SHOPPING-BF-CDP-GGL-D24-024_037_TOOLS_SAFETY-NA-Multi-NA-PLALIA-NA-NA-NA-NA-NBR-NA-NA-NA-FY21_Sundries_PLALIA&cm_mmc=SHOPPING-BF-CDP-GGL-D24-024_037_TOOLS_SAFETY-NA-Multi-NA-PLALIA-NA-NA-NA-NA-NBR-NA-NA-NA-FY21_Sundries_PLALIA-71700000075826646-58700006498654207-92700058683660963&gad_source=1&gbraid=0AAAAADq61Udufk4ne7OHSMYE7lndtKT-v&gclid=CjwKCAjw-O6zBhASEiwAOHeGxT6Dw1L6kRnzSA3Hfs0LIZeDrKyTJ-nvWz_Y9Cfav3ipXWAVMWyycxoCEaYQAvD_BwE&gclsrc=aw.ds
This tool is the best money I ever spent. Removed my old caulk last night. Took less than ten minutes.
It looks like there is still a lot of caulk left under the bottom rim of tiles (assume it's caulk not grout) if you cut that out with a razor, then really clean and scrub the gap that's left, then go back in and fill it with the good silicone with the mold resist stuff in it, that will help. You need to perform maintenance on it through, clean it on the regular, spray it with vinegar, etc. I battled something like this over and over it wasn't until I got the old stuff mostly out and really cleaned the heck out of the gap that was left before refilling it would just creep back through and be nasty again in a couple months.
It's grout at the bottom. I don't know why they choose to seal with grout seam between tiles and shower tub which is pretty flexible itself. Will try another round to get rid of it and will lurk for best silicone (maybe epoxy based resinoid) to seal it. As I am afraid under the shower pan there are plenty of moisture over these years.
you can get a rubber molding online. its basically quater round thats water proof. some of them are even peel and stick. i would do a very thin layer of silicone first just to make sure its waterproofed behind it, then do that.
Is the wall solid? Or can the lowest rank of tile be "pushed" into the soft wall behind it?
If the latter then you need to demo and replace.
If the former then clean/repair the grout thoroughly around that rank of tiles, and remove/replace the caulk at the bottom edge.
Before doing that ... if possible, leave the shower unused for several days.
Then, when you remove the old caulk ...
If there's any sign of wetness in the exposed gap, then I'd consider a proper repair.
But if it's dry, a re-caulk job will do just fine.
I am afraid if i push more tiles it will crack. there is a gap between tiles and plastic and probably it needs to be filled with some medium. Maybe foam?
Silicone
well, silicone was there before as you may see it becomes mold too.
You cut the old silicone away with suitable tool and clean the area. Then you install new silicone meant for such wet shower location (read: anti-mold compound included). Silicone is the correct material there. See for example: [https://www.youtube.com/watch?v=HiujAReaNRk](https://www.youtube.com/watch?v=HiujAReaNRk)
New silicon caulk and regular cleaning will help reduce the re-molding. There is no "one and done" fix for an area that gathers water like that other than a complete redesign.
Silicone caulk is the answer FOR YOUR LANDLORD.
Use a bath grade silicone. I suggest a silicone type 1. Every silicone in store will have the silicone type in fine print on it usually by itself near the top on the back. I've used type 2 silicones in bathrooms and it has always yellowed the next day due to the chemical compounds of what make up silicone 2 and the humidity left in the air.
lol. Caulk it. It all gets moldy at some point. That’s when you re-do the caulking.
it took me an hours to get rid of old one. That was challenging
https://www.homedepot.com/p/Husky-3-in-1-Caulk-Tool-CT31-HKY/317831769?source=shoppingads&locale=en-US&pla&mtc=SHOPPING-BF-CDP-GGL-D24-024_037_TOOLS_SAFETY-NA-Multi-NA-PLALIA-NA-NA-NA-NA-NBR-NA-NA-NA-FY21_Sundries_PLALIA&cm_mmc=SHOPPING-BF-CDP-GGL-D24-024_037_TOOLS_SAFETY-NA-Multi-NA-PLALIA-NA-NA-NA-NA-NBR-NA-NA-NA-FY21_Sundries_PLALIA-71700000075826646-58700006498654207-92700058683660963&gad_source=1&gbraid=0AAAAADq61Udufk4ne7OHSMYE7lndtKT-v&gclid=CjwKCAjw-O6zBhASEiwAOHeGxT6Dw1L6kRnzSA3Hfs0LIZeDrKyTJ-nvWz_Y9Cfav3ipXWAVMWyycxoCEaYQAvD_BwE&gclsrc=aw.ds This tool is the best money I ever spent. Removed my old caulk last night. Took less than ten minutes.
Only an hour?
hourS :) and still have room to improve as you may see. I tried vinegar 8% which worked fine with mold
It looks like there is still a lot of caulk left under the bottom rim of tiles (assume it's caulk not grout) if you cut that out with a razor, then really clean and scrub the gap that's left, then go back in and fill it with the good silicone with the mold resist stuff in it, that will help. You need to perform maintenance on it through, clean it on the regular, spray it with vinegar, etc. I battled something like this over and over it wasn't until I got the old stuff mostly out and really cleaned the heck out of the gap that was left before refilling it would just creep back through and be nasty again in a couple months.
It's grout at the bottom. I don't know why they choose to seal with grout seam between tiles and shower tub which is pretty flexible itself. Will try another round to get rid of it and will lurk for best silicone (maybe epoxy based resinoid) to seal it. As I am afraid under the shower pan there are plenty of moisture over these years.
With some kind of sealant I assume
you can get a rubber molding online. its basically quater round thats water proof. some of them are even peel and stick. i would do a very thin layer of silicone first just to make sure its waterproofed behind it, then do that.
Is the wall solid? Or can the lowest rank of tile be "pushed" into the soft wall behind it? If the latter then you need to demo and replace. If the former then clean/repair the grout thoroughly around that rank of tiles, and remove/replace the caulk at the bottom edge. Before doing that ... if possible, leave the shower unused for several days. Then, when you remove the old caulk ... If there's any sign of wetness in the exposed gap, then I'd consider a proper repair. But if it's dry, a re-caulk job will do just fine.
I am afraid if i push more tiles it will crack. there is a gap between tiles and plastic and probably it needs to be filled with some medium. Maybe foam?
Caulk