On Jul 12, 10:45*am, "Ed Sowell"
wrote:
This is in a shower constructed with a cultured marble-like substance called
Granitex. The joints are sealed with a clear silicone sealant. Some area
have blackened.

I've read that mildew resistant or free silicone sealants are available, but
thought I'd look into alternatives before replacing it.

TIA

Ed

Bleach kills mold