Below is a photo of the "grout" that runs between our tub and shower walls. I put "grout" in quotes because it's not traditional grout. It looks like it was some sort of pre-made,rubbery strip that was applied.
As you can see, it has terrible mold. I have tried treating it with bleach, but the mold stains persist. I'm think we just need to replace the "grout."
But can anyone tell me what the real name for this sort of "grout" is??
It is probably a one piece, preformed, vinyl strip that originally stuck with it's own adhesive strip. NOT water tight or mildew proof. I would get a blade holder, pair of pliers and maybe a 5 in one tool and remove it to see what the seam is like behind it. Hopefully (but I would not count on it) the moisture has not penetrated behind the shower walls.
If you can scrape it clean enough, kill all the mold, and gap is small enough, then use a 100 percent silicone caulk with a mildew-cide to seal the gap. But until you reveal what is underneath it is all guess work.
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