Bleach causes ‘more mould’ on silicone sealants but 1 item makes it ‘disappear like magic’

If you've tried your hand at cleaning mould on silicone sealants previously, you'll know how hard it is to remove.

By Angela Patrone, Lifestyle Reporter

Mould fungus and rust growing in tile joints in damp poorly ventilated bathroom with high humidity, wtness, moisture and dampness problem in bath area

Bleach causes ‘more mould’ on silicone sealants but 1 item makes it ‘disappear like magic’ (Image: Getty)

Mould growth on silicone sealants is a persistent problem that many UK homes face.

Mould thrives in damp and humid environments, which makes bathrooms and kitchens its perfect hideaway. 

Silicone sealants, which are water-resistant by nature, can still develop mould when conditions are just right.

Unsure of how to tackle silicone sealant mould around the shower, one woman took to the Mrs Hinch Cleaning Tips and Tricks Facebook page for advice.

Shenazmataz Patel wrote: “Please help! I have black mould growing behind the silicone seal on the bottom of my shower glass screen.

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Dirty bath tub with silicone sealant mould

Mould is commonly present around baths and showers (Image: Getty)

“I did leave bleach over it overnight and it did help but has come back worse with more mould which I have since read happens with bleach.

“How can I remove it? There isn’t any mould in any other part of the bathroom or house.”

The problem with bleach is it does nothing to remove the mould. Instead, it bleaches the colour of the mould, giving the illusion of a mould-free surface. 

Since bleach doesn't kill the roots underneath porous surfaces, it will only cause the mould to grow deeper and stronger as a reaction to the bleach. 

Paula Darling warned: “Bleach will only whiten mould and it’ll feed mould and cause it to grow more.”

Spraying silicone sealant mould

Bleach will only whiten and feed mould (Image: Getty)

Instead, Mrs Hinch fans recommended Shenazmataz use Astonish Mould and Milder Blaster.

Diane Smith wrote: “Astonish mould and mildew spray is brilliant and very cheap.”

Posting a picture of the product, Natalie Murphy said: “Have you tried this? I swear by it.”

Jem Badrudin claimed: “No soaking of paper roll or scrubbing needed. Just simply spray spray spray the cheap Astonish spray where there’s mould. 

“Leave it on as long as you want, the longer the better and simply rinse with the shower. Disappears like magic. Works every time.”

Previously speaking to Express.co.ukAstonish’s cleaning expert Olivia Young claimed that a few sprays of this product will remove mould stains “in a matter of minutes”.

She said: “Simply spray, leave for two to three minutes and then wipe clean without the need for scrubbing.”

The expert explained that this specialist cleaner is made with an active formula, which means “not only does it tackle mould then and there”, it also “prevents the return of any mould or mildew” for months.

Households can pick up one bottle of the Astonish Mould and Mildew Blaster from Lakeland for £2.99 or a pack of three from B&Q for £8.67.

Alternatively, Mrs Hinch fans have previously recommended the HG mould spray which retails for £5.25 on Amazon and for £6 at Wickes.

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