Sealant turning black

[Teddy B]

Any tips please as to return the white sealant from black mould to white again. Thanks

 

[Al-Di]

you could try a very light bleach solution,

 

[ryan_flea]

I have used diluted cillit bang mould remover and a scrubbing brush or tooth brush and elbow grease. Not sure where or how much is appearing. A pic could help others advise. Hope you sort it