How to Clean uPVC Window Sills

It so happens that after repair or after flower pots, which we put on the windowsill, there are traces: from rust, from water that dries, from dirt from the window … And if the dust can be removed relatively quickly with an ordinary damp cloth, then in the fight against eaten spots, it is necessary to apply more aggressive methods.



  • Baking soda
  • 9% vinegar
  • Cheap detergent for dishes
  • Warm water
  • Clean rag

Precedence rule:

A similar method is shown in this video:

As the reviews of many homemakers show, it is in this way that you can get rid of absolutely most of the stains, which is especially clearly visible on white windowsills made of plastic.

But there are a few more ways that we would like to mention.



Modern household chemicals offer consumers a vast selection of cleaning products that can effectively cope with such pollution.

Pay attention to:

First of all, we advise Omestos. A powerful and practical thing. Allows you to remove any old stains, yellowness and rust. Apply it to the washcloth, evenly distribute, leave for a quarter of an hour, after which we rinse thoroughly. All!

“Mister” to cope with most of the spots. Universal Mr Proper. This is a well-known powdered remedy. Apply it to a sponge moistened in water, and begin to wipe well. After, do not forget to wipe the window sill with a clean damp cloth thoroughly.

Sanita. It is the best option for kitchens, wherein traces of fat should also be removed parallel with the dust. Be prepared that it has a strong and pungent smell.

Permolux. The cream is intended to remove small contaminants, but you will have to repeat the procedure if it is already old.

Means for washing glasses, napkins for office equipment, laundry soap. Such household chemicals will effectively cope with minor pollution.

When choosing chemistry, please pay attention to the corresponding inscription on the label, indicating the possibility of its use on plastic surfaces.

Remember, whatever tool you choose, work on cleaning the window sill should be carried out in rubber gloves.

After treatment, the surface is thoroughly washed several times with water.



Despite the variety of household chemicals in the modern market, many homemakers prefer folk remedies that carry the minimum possible threat to health.

To effectively clean various contaminants from window sills, you can use:

  • Chalk or tooth powder. The old “grandfather’s” method. Dissolve them in a small amount of water and apply to the surface. You should wait until it dries and wipe it with a dry sponge. Soft abrasive substances do not scratch the window sill.
  • A mixture of baking soda and vinegar. This composition is used for old spots. Pour some soda on the dirt and wipe it with a napkin dipped in vinegar. Please do not leave the mixture for a long time because it can cause pigmentation of the window sill.
  • Melamine sponge is a natural miracle assistant to modern homemakers, combining efficiency, no toxicity and ease of use.
  • They, like an eraser, remove impurities without requiring the additional use of cleaning agents. Only water is enough.

Folk remedies in the fight for the cleanliness of window sills are not as effective as household chemicals, so you will have to make more effort to remove contaminants.



A window sill with outdated rust stains or traces of flower pots with folk remedies is unlikely to be cleaned.

Severe household chemicals will be required, in particular Cosmofen 10. It is ideal for removing any contaminants.

The tool is quite toxic, so it is recommended to use a respirator additionally.

After completion of the work, you should thoroughly ventilate the room.

Lime plaques can be removed under the power of Cillit Bang spray.

The composition is sprayed on the window sill, evenly distributed with a sponge and left for 10 minutes, after which we rinse well.

If you could not prevent the appearance of stains from the primer, then to remove them, you can use mounting foam or alcohol to soften the colour, special scrapers or sponges with the hard pile.

SZOP will help to remove not only primer and rust but also cement with gypsum

Remember: pollution is easier to prevent because it is unlikely to get rid of them effortlessly.

Put napkins or plates under the pots with flowers, securely close the window sill before repairing, and wipe off stains as soon as you notice.



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