Hi,

I have a shower stall that over the years has apparently had some grout
cracks fixed with RTV/Silicone.

As to be expected, I guess, there is some mold on the Silicone.

Seems to be Not on surface, but probably very slightly below the
Silicone surface. I would guess not too deep, but hard to tell.

Have tried all the normal cleaners, and Chlorox; none seem
to penetrate (at all).

Any suggestions as what to try next ?

The Silicone is probably somewhat porous on the surface, and going down
the very small amount where the mold is, so I can't help feeling that
there might be something that would get down there. Is there ?

Really don't want to have to remove the Silicone, if I can avoid it.

Thanks,
Bob

On 3/11/2012 2:10 PM, Robert11 wrote:
Hi,

I have a shower stall that over the years has apparently had some grout
cracks fixed with RTV/Silicone.

As to be expected, I guess, there is some mold on the Silicone.

Seems to be Not on surface, but probably very slightly below the
Silicone surface. I would guess not too deep, but hard to tell.

Have tried all the normal cleaners, and Chlorox; none seem
to penetrate (at all).

Any suggestions as what to try next ?

The Silicone is probably somewhat porous on the surface, and going down
the very small amount where the mold is, so I can't help feeling that
there might be something that would get down there. Is there ?

Really don't want to have to remove the Silicone, if I can avoid it.

Thanks,
Bob

I sometimes put a few drops of pure Clorox on moldy chalk lines and let
it sit. Sometimes takes a while to bleach.

Robert11 wrote:
Hi,

I have a shower stall that over the years has apparently had some grout
cracks fixed with RTV/Silicone.

As to be expected, I guess, there is some mold on the Silicone.

Seems to be Not on surface, but probably very slightly below the Silicone
surface. I would guess not too deep, but hard to tell.

Have tried all the normal cleaners, and Chlorox; none seem
to penetrate (at all).

Any suggestions as what to try next ?

The Silicone is probably somewhat porous on the surface, and going down
the very small amount where the mold is, so I can't help feeling that
there might be something that would get down there. Is there ?

Really don't want to have to remove the Silicone, if I can avoid it.

Thanks,
Bob

I tried the hard approach. Does not work. Your going to have to redo it
with mold resistant rtv.

Greg

On Mar 11, 1:10*pm, Robert11 wrote:
Hi,

I have a shower stall that over the years has apparently had some grout
cracks fixed with RTV/Silicone.

As to be expected, I guess, there is some mold on the Silicone.

Seems to be Not on surface, but probably very slightly below the
Silicone surface. *I would guess not too deep, but hard to tell.

Have tried all the normal cleaners, and Chlorox; none seem
to penetrate (at all).

Any suggestions as what to try next ?

The Silicone is probably somewhat porous on the surface, and going down
the very small amount where the mold is, so I can't help feeling that
there might be something that would get down there. *Is there ?

Really don't want to have to remove the Silicone, if I can avoid it.

Thanks,
Bob

As stated above, mold resistant silicone is the only fix. The downside
is the amount of work involved. The upside is that silicones stick to
silicones extremely well, so your work will likely be successful.

Joe

On 3/13/2012 8:29 PM, Joe wrote:
On Mar 11, 1:10 pm, wrote:
Hi,

I have a shower stall that over the years has apparently had some grout
cracks fixed with RTV/Silicone.

As to be expected, I guess, there is some mold on the Silicone.

Seems to be Not on surface, but probably very slightly below the
Silicone surface. I would guess not too deep, but hard to tell.

Have tried all the normal cleaners, and Chlorox; none seem
to penetrate (at all).

Any suggestions as what to try next ?

The Silicone is probably somewhat porous on the surface, and going down
the very small amount where the mold is, so I can't help feeling that
there might be something that would get down there. Is there ?

Really don't want to have to remove the Silicone, if I can avoid it.

Thanks,
Bob

As stated above, mold resistant silicone is the only fix. The downside
is the amount of work involved. The upside is that silicones stick to
silicones extremely well, so your work will likely be successful.

Joe

false. true 100% silicones don't stick to much of anything, including
itself.

chaniarts wrote:
On 3/13/2012 8:29 PM, Joe wrote:
On Mar 11, 1:10 pm, wrote:
Hi,

I have a shower stall that over the years has apparently had some grout
cracks fixed with RTV/Silicone.

As to be expected, I guess, there is some mold on the Silicone.

Seems to be Not on surface, but probably very slightly below the
Silicone surface. I would guess not too deep, but hard to tell.

Have tried all the normal cleaners, and Chlorox; none seem
to penetrate (at all).

Any suggestions as what to try next ?

The Silicone is probably somewhat porous on the surface, and going down
the very small amount where the mold is, so I can't help feeling that
there might be something that would get down there. Is there ?

Really don't want to have to remove the Silicone, if I can avoid it.

Thanks,
Bob

As stated above, mold resistant silicone is the only fix. The downside
is the amount of work involved. The upside is that silicones stick to
silicones extremely well, so your work will likely be successful.

Joe

false. true 100% silicones don't stick to much of anything, including itself.

Not so false. If you clean the old residue with greased lightning, it will
stick.
True, old silicone has a sort of film that's prevents good sticktion, but
it will come off with cleaner. Most of the old, must be scraped off, to get
a good corner.

Greg