It was time to re-caulk my bathtub, due to mold/mildew in the surface.
The walls are tile down to just above the bathtub and the plumber had apparently used a clear caulk over grouting. I successfully removed the clear caulking, but then some the "grout" pulled out. It's almond colored, but still soft and flexible. My best guess is it's either a colored caulk or a putty.
At this point I think I have the following options:
- Fill the gap with an almond caulk then top it with fresh clear caulk
- Just completely fill the gap with a clear caulk
- Fill the gap with a backer rod then caulk over it
- Completely fill the gap with white caulk
The problems I see
- The wall tiles are thick, so the gap is deep, but it's not tall (less than 1/8") - which will make backing rod hard to get in there.
- I probably need to spread the caulk a little to either side of the gap/join to ensure it's water-tight.
- Using a White caulk will look bad spread up the tiles, and using a colored caulk will look bad spread across the white tub top
- Using a colored caulk behind clear will make it look like grouting in the gap but
- I'm not convinced the clear caulk will adhere to the colored stuff (this may be why they had spread it onto the bath and tiles).
- I don't how long (or whether) to let the colored caulk dry before applying the clear
- I've managed to lay my hands on silicon colored caulk to go with the silicon clear, but only the clear caulk is mold-resistant.
- Fill the deep gap with clear caulk will obviously look opaque ... and I'm not sure how it will look in the end.
And, obviously, a heavily used bath/shower is out of action while it all completely cures.
Suggestions desperately welcomed!
Here's the "grout" that was behind the clear silicone