How to remove black mould from window silicone with HG Mould Spray

Black mould on window silicone is common in damp rooms. This guide shows how to treat it with HG Mould Spray, from prep to rinsing, so the seal looks cleaner. It suits anyone with mouldy silicone around windows or bathroom seals.

HG Mould Spray: Remove Black Mould from Window Silicone | Easy Cleaning Method, by aljoin on YouTube. 1 min 35 s.

Video length
1 min 35 s
Time to do it
20 minutes
Difficulty
Easy
Steps
8

What you need

Steps

  1. Open the window and ventilate the room well. Put on rubber gloves and eye protection before you start, since mould spray is harsh.

  2. Check the silicone for damage. If it is cracked, peeling or loose, the mould is likely behind it and the seal needs replacing instead of cleaning.

  3. Shake the HG Mould Spray bottle and test it on a small hidden patch of silicone first to make sure it does not discolour the surface.

  4. Spray the mouldy silicone evenly from about 10 to 15 cm away. Cover the black spots fully but do not soak the surrounding frame or walls.

  5. Leave the spray to work for about 30 minutes. The mould should start to fade as the product reacts.

  6. Wipe the silicone with a damp cloth or sponge to lift the loosened mould and leftover spray.

  7. Rinse the area with clean water and dry it with a cloth. Check the result and repeat the spray on any spots that remain.

  8. Wash your hands and rinse the cloth well after use. Keep the room ventilated until the smell clears.

Tips and common mistakes

Never mix mould spray with bleach or other cleaners, as the fumes can be dangerous.

Keep the room ventilated and avoid breathing the spray mist.

If mould keeps coming back, fix the damp source such as condensation or a leak.

Replace silicone that is badly stained or lifting, since cleaning will not fix it.

Questions

How long does HG Mould Spray take to work?

Leave it on for around 30 minutes so it can break down the mould. Heavier staining may need a second application.

Can I use it on bathroom silicone too?

Yes, the same method works on bathroom seals and other silicone around the home. Test a small area first.

Is HG Mould Spray safe on painted frames?

It can damage some paints and finishes, so keep it on the silicone and wipe any overspray off quickly.

This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.

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