A mould spray can clear mould on the surface of tiles, grout and silicone. If it has grown into the sealant, replacing the sealant is often the only fix.
| Your situation | Try this |
|---|---|
| Black marks on tiles or grout | A mould spray made for tiles and grout (step 2). [1] |
| Black spots on silicone that won't shift | The mould is likely in or under the sealant. Replace it (step 3). [2] |
| Mould on the ceiling | HG doesn't recommend its mould removers on ceilings, as they can weaken how paint and plaster bond. [1] |
| Wood or a fridge seal | HG mould spray isn't suitable for wood or fridge rubber seals. [1] |
| A large area, or it keeps coming back | You may need a professional, and to find the cause of the damp. [3] |
| You rent your home | Tell your landlord. Government guidance says landlords should tackle the underlying causes, not just the surface mould. [4] |
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Mould on sealant usually comes from moisture and surfaces not drying out. [2]
HG's note: if the mould is in or under the sealant, its products can't remove it, and replacing the sealant is often the only solution. [2] If you've cleaned it properly and the black spots are still there, that's the likely reason.
HG's method for its mould spray (tiles, grout, silicone joints, plaster): [1]
HG's mould spray has a bleaching effect. Test it first on a hidden spot if you're unsure, and read the label. [1]
If the mould has got into the sealant, cleaning won't fix it: replacing the sealant is often the only solution. [2]
If you rent, tell your landlord. Government guidance says landlords should remove the mould, using a qualified professional where appropriate, and tackle the underlying cause. [4]