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How to clean bathroom and kitchen mould on silicon grout?

Hi there!

I was wondering if anyone can kindly recommend me a product to remove/kill mould on my kitchen and bathroom Silicone and also grout.

I've tried the selleys spray. Also, if you can kindly recommend a product that won't smell to harsh as I have a young toddler.

Thanks so much for the help x

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MitchellMc

Hi @penpan8988,

If you've tried cleaning this previously, the mould has likely stained the white silicon. If this is the case, no amount of scrubbing or products will remove it from the surface. Removing the silicone and replacing it with fresh caulking would be the best course of action.

Here's a helpful step-by-step guide on How to apply bathroom sealant.

If you're not keen on replacing the sealant, I've had good luck with 30 Seconds 1L Shower Cleaner, so it would be worth trying before replacing the silicone. It might not remove the marks entirely, by it should make them less noticeable. It's best to open any windows in the bathroom whilst using it or run the exhaust fan. It doesn't smell particularly harsh, but it's best to ventilate the room whilst using it. Remember your PPE, including a face mask, gloves, safety glasses, enclosed footwear and a long-sleeved shirt and pants.

Please let me know if you have any questions.

Mitchell

MrSober

@penpan8988

I have had success with using vinegar to kill and stop the growth of the mould and then using something like bleach to remove the staining in some cases.

The way I found to keep the liquid on the silicon is to using toilet paper or the like, spray it then push it up against the silicon to make it stay there and lesson it drying out so you can leave it there for a few hours. Never mix the two together though as it creates chlorine gas, wash well with water in between each chemical.

penpan8988

Thanks for your reply, much appreciated.

May I ask a facemask such as a n95 should be sufficient? Or is there a better mask I can grab at bunnings?

penpan8988

Thanks for the reply. I appreciate it, will take this into consideration 👌

EricL

Hi @penpan8988

The N95 mask will be adequate for the task. Please make sure to open all the windows and doors in the room to promote air circulation. If you have an exhaust fan, I suggest turning it on while using the product.

Eric

penpan8988

Wish me luck, all from bunnings

KatieC

Good luck @penpan8988!

Let us know how you go, we would love to see a photo of the results.

Katie

penpan8988

Hi Katie,

As an update, it didnt work 🙁 Guess I will have to remove the grout/silicone.

penpan8988

Hi Michell,

Hope you are well,

Unfortunately the products didnt work 🙁

So now i'm looking at removing the grout and silicone. I was wondering, would you recommend Epoxy Grout?

I'm looking for a mould resistant product for my bathroom and kitchen sink.

Thanks so much!

MitchellMc

Epoxy grouts work for non-flexible areas @penpan8988. Typically they are not the best for areas with potential movement like joins between the wall and floor, as they can crack. Wet-area mould-resistant silicones are much better for those areas. They are flexible and contain a fungicidal protector for excellent mould and fungal resistance.

Most grouts are resistant to mould, but if you want to protect a normal grout from mould further, it's best to coat it with grout sealer, which inhibits stains and mould from entering the porous cement-based grout.

Just a final note before you remove any grout. The spray you've used has effectively killed the mould; now, it's just a stain in the cement-based grout. I get this all the time and am not going to remove the grout to resolve it. I use grout paint to cover these stains and do the whole bathroom every couple of years to restore the brightness of the grout. My favourite product is Dunlop 250ml Grout Paint - Ultrawhite, as it has a fantastic applicator tip and works a treat. Simply squeeze the bottle and apply it over the grout lines. No need to be neat; you can just get it on the tiles as well. After 20min, you can take a mild scrubbing sponge and remove the excess off the tiles. These grout paint pens are great for small touch-ups, but I've found that their nibs get a bit torn up by the rough grout if you're trying to do a whole bathroom.

Please let me know if you have further questions.

Mitchell

penpan8988

Hi MichellMc,

Thanks for saving me, i didnt know epoxy isnt suitable for areas that move. I guess all the areas that have been silicone have been done for a reason.

I probably dont want to DIY this as I'm not exactly the most handiest person out there. May I ask if you know who I can hire for this job (tiler?)? I will endeavor to make sure they use Wet-area mould-resistant silicones.

Though before they remove the silicone, would it be beneficial for me to try wiping down the area again with something to kill the mould? Any advice would be much appreciated.

As for the grout in my bathroom and kitchen which needs a deep clean (no mould as far as I can see), what product would you recommend just for a clean? Once I clean it I will buy the Dunlop grout sealer and seal my bathroom floors and kitchen tiles grout.

Thanks again!

EricL

Hello @penpan8988

If you are not keen on doing the silicone sealing, I suggest engaging the services of a handyperson or perhaps posting the job on Airtasker or Hipages.

If you wish to clean the area before the silicone is removed, I recommend using Selleys 750g White For Life Tile And Grout Cleaner.

However, if you are curious to see how the silicone will be replaced, here is a link to a step-by-step guide: How to silicone seal a bath. (the technique used is applicable to your situation)

If you need further assistance, please let us know.

Eric

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