Bathroom Sealant Leaves Black Mould?

[Sunny88 0]

We have moved into new house for 6 months. Recently, I noticed that there was "blackish mould" in the silicone sealing used for these 2 areas: bathroom sink to join with the bathroom tiles; and the area joining the showerscreen to the aluminium lining on the bathroom floor.

This "mould" can be seen but it is trapped within the silicone and cannot be scrubbed off.

We complained to the contractors cos it happened within 2 months. They said yes will fix it , then came to re-do new silicone, but warned us that the problem will recurr and it did after a few months, even if they use the best silicone in the market.

Any advice? I'm flabbergasted!

[bepgof 20]

We have moved into new house for 6 months. Recently, I noticed that there was "blackish mould" in the silicone sealing used for these 2 areas: bathroom sink to join with the bathroom tiles; and the area joining the showerscreen to the aluminium lining on the bathroom floor.

This "mould" can be seen but it is trapped within the silicone and cannot be scrubbed off.

We complained to the contractors cos it happened within 2 months. They said yes will fix it , then came to re-do new silicone, but warned us that the problem will recurr and it did after a few months, even if they use the best silicone in the market.

Any advice? I'm flabbergasted!

It's like that, don't use clear or white silicon. Use black color!

Edited August 7, 2010 by bepgof

[Len 0]

We have moved into new house for 6 months. Recently, I noticed that there was "blackish mould" in the silicone sealing used for these 2 areas: bathroom sink to join with the bathroom tiles; and the area joining the showerscreen to the aluminium lining on the bathroom floor.

This "mould" can be seen but it is trapped within the silicone and cannot be scrubbed off.

We complained to the contractors cos it happened within 2 months. They said yes will fix it , then came to re-do new silicone, but warned us that the problem will recurr and it did after a few months, even if they use the best silicone in the market.

Any advice? I'm flabbergasted!

My +6 years old kitchen and toilet used clear silicone sealing. After my weekly washing of toilets, I will spray Look (AB) Mould Killer if I see any "blackish mould" in the sealings esp in the area joining the showerscreen to the aluminium lining on the bathroom floor. To-date, it's as good as new. This spray is easily available in most NTUC, Medi-ya and Isetan supermart.

Good luck

[limmike 0]

We have moved into new house for 6 months. Recently, I noticed that there was "blackish mould" in the silicone sealing used for these 2 areas: bathroom sink to join with the bathroom tiles; and the area joining the showerscreen to the aluminium lining on the bathroom floor.

This "mould" can be seen but it is trapped within the silicone and cannot be scrubbed off.

We complained to the contractors cos it happened within 2 months. They said yes will fix it , then came to re-do new silicone, but warned us that the problem will recurr and it did after a few months, even if they use the best silicone in the market.

Any advice? I'm flabbergasted!

The same occured to my shower screen area less than 3mths. Not of much help even i installed the ventillation fan... forum members any advice? will try the Look (AB) Mould Killer as suggested. Thx.

[Len 0]

The same occured to my shower screen area less than 3mths. Not of much help even i installed the ventillation fan... forum members any advice? will try the Look (AB) Mould Killer as suggested. Thx.

After you have washed the toilet or wherever is required, just spray at the 'mouldy' spot and leave it alone. When the spray has done its work, the spot will be clear and good as new.

Do provide your feedback.

[limmike 0]

After you have washed the toilet or wherever is required, just spray at the 'mouldy' spot and leave it alone. When the spray has done its work, the spot will be clear and good as new.

Do provide your feedback.

Thanks for your sharing, btw, i also see some tiny little flies sticking around wall/mirror areas.... thot can kill easily but it's irritating to see it there... what can i buy to get rid ? if you happen to know Thx

[Len 0]

Thanks for your sharing, btw, i also see some tiny little flies sticking around wall/mirror areas.... thot can kill easily but it's irritating to see it there... what can i buy to get rid ? if you happen to know Thx

A friend used to have this problem in his newly renovated toilet. He tried bleach, Dettol, insect repellents but it did not work. Finally he repainted his toilet ceiling with Nippon Medifresh and the flies went away. It's more than 6 months. So far so good

[bepgof 20]

A friend used to have this problem in his newly renovated toilet. He tried bleach, Dettol, insect repellents but it did not work. Finally he repainted his toilet ceiling with Nippon Medifresh and the flies went away. It's more than 6 months. So far so good

I went through a big route. After realising can't clean this away, I removed all of them with sharp blade. Put the clear silicon again. Few months later, same problem. Removed all, put white silicon, few months later still the same. Lesson learnt become smarter, put black silicon (look not so nice on glass) but problem solved!

Edited August 8, 2010 by bepgof

[limmike 0]

I went through a big route. After realising can't clean this away, I removed all of them with sharp blade. Put the clear silicon again. Few months later, same problem. Removed all, put white silicon, few months later still the same. Lesson learnt become smarter, put black silicon (look not so nice on glass) but problem solved!

Wah ! Tedious job indeed.... Any more sharing from forum members on topics to get rid of mould on silicone & small insects sticking on wall ? Thx Thx

[Jstar_closet 0]

Was told that black silicone will also show white spot. will try the Look (AB) Mould Killer.

I went through a big route. After realising can't clean this away, I removed all of them with sharp blade. Put the clear silicon again. Few months later, same problem. Removed all, put white silicon, few months later still the same. Lesson learnt become smarter, put black silicon (look not so nice on glass) but problem solved!

[Warrior88 0]

Anyone try to inject Sodium Hypochlorite Bleach Chemical into the silicon ? Just a crazy thought ?

[w7_lee 11]

I'm at my new home for 8 months and permanently resolve the mould problem for 6 months. So just to share with you guys & gals...

For the silicon between the sink & wall, remove it. Use white cement instead. The sink would be bolted to the wall, so the silicon & cement is only to fill in the gap, no value adding reason. Any mould growth there is unavoidable since this area will get wet. With cement, you can brush it off with a used toothbrush (or mould remover agent).

For the mould growing IN THE silicon between the glass showerscreen and the aluminimum lining on the floor. You will have to remove the moulded silicon. By applying fresh silicon, the mould will grow back in time. I could not find any good suggestions in all forums and found a permanent fix myself. I know the eye-sore, so do try it & share it with around if you feel it works.

First thing to do is you need to identify how much space is available between the internal aluminimum lining & the glass showerscreen once the old (moulded) silicon is removed. For reference: the total internal width of my aluminimum lining is 18mm, glass is 10mm thick, so I have an 8mm gap to fill with silicon.

Then, make your way down to Towner Road Blk 101. There is a shop there (G****N Pte Ltd) that specialise in rubber products. Purchase from them the Silicon Strips. These are silicon but pre-moulded in the factory. Unfortunate is that standard width is 10mm, depth can be cut to our specs. You need to pre-order and they are not cheap (but worth it). Once you collect the strips, remove the moulded silicon (clear as much as you can the residuel silicon in the alumininum linings) and squeeze in the strips to take it's place.

1 thing to note is that silicon is compressible but nobody know how much to compress. If we to overcompress, the glass may crack during expansion (hot shower) or accidental knocks on the glass. For my 8mm gap, I ordered 10mm wide strips and compress the silicon by 2mm. So far, there's been no issue & I have a 2 Y.O. toddler that bath (and play) there.

I don't know if any contractor will do this for you. I D.I.Y myself.

[rickoveron 0]

?? there are anti-mold silicon sealant in the market.... can check home-fix.

[forgotten 1]

I managed to find AB Mould Killer at cold storage.

Edited September 4, 2010 by forgotten

[bigfunk 0]

I have the same problem. Black mould spots all the time. I was shopping at the Household goods store at Jurong Point and

happen to come across Waterproof adhesive seal strips. $9.90 for 3.2m. And I put it over the spot (between the sink and wall)

and no more mould! Saw it at Homefix too but more expensive.

Looks something like this. http://www.g4tape.com/index.asp?lbid=628