Home Life & Style Bleach causes ‘more mould’ on silicone sealants but 1 item makes it...

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


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.

“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.”

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.”

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