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How To Clean A Granite Composite Kitchen Sink

Designed with durability in mind, a composite granite sink is a fantastic addition to any kitchen. However, regular cleaning is essential when it comes to keeping your granite composite kitchen sink in tip top condition. In this guide we take you through how you can keep your granite composite looking its best and things you should avoid.

How To Clean Your Granite Composite Sink:

Daily Cleaning

The best way to avoid the need to 'deep clean' your composite sink to remove any stains is to clean it regularly after every use. For a daily clean, use some soapy water and a sponge or soft cloth and be sure to dry off the sink when you're finished. This will allow you to remove any stains, limescale and water spots before they have a chance to take hold. Although it may be a difficult habit to keep up, this quick everyday clean will save you a lot of hassle in the long run and will help keep your sink looking its best.


Deep Clean

For a more thorough clean, sprinkle baking soda over the whole sink, then spray with a 75/25 solution of white vinegar and water to create a fizzing solution. A gentle scrub with a soft sponge and an old toothbrush is enough to give your sink a thorough clean. Rinse off the solution and repeat the process, allowing the sink to dry afterwards. Applying a light layer of food grade mineral oil will add a protective repellent layer to your sink - simply leave the oil on the surface for 45 minutes then buff with a cloth. Repeat the process if needed.


With a granite composite sink, prevention of stain and limescale build up is key. A deeper clean should always be seen as a last resort when your daily cleaning hasn't been effective.

What Not To Use On Granite Composite Sinks

Although there are some things you should be doing to keep your granite composite sink looking great, the list of things not to do is arguably more important. The list below outlines some of the things we recommend you avoid doing to keep your sink at its best.

Abrasive Materials

When cleaning your sink, it’s important not to use anything abrasive. Steel wool, abrasive brushes and scouring pads will leave scratch marks. Instead, clean your sink with soft sponges to protect the exterior.


Harsh Chemicals

Avoid substances like bleach and harsh chemical cleaners as this could damage the surface of your sink and cause staining. Chemicals to avoid include ammonia, sodium hydroxide, hydrochloride and sulphuric acid. If in doubt, check with your manufacturer or stick to something that’s designed specifically for a composite sink.

Other Materials To Avoid:

Leaving Wet Sponges In The Sink

We’re all guilty of this, but it’s important to be mindful of leaving wet sponges in your sink. If left for too long they’ll leave water marks or limescale deposits. Ultimately, this’ll mean more work for you in the long run.

Using Plastic Bowls Or Drainers

Plastic drainers or plastic bowls can accumulate grit on their underside. This grit can then cause scratches when moved around so plastic bowls aren't recommended.



Some composite sinks can be damaged by heat, but purchasing a high-quality sink which has been designed for heat resistance is the best way to avoid this. It’s also best to avoid putting extremely hot pots and pans on the surface. If in doubt as to your sink’s heat resistance, check with your manufacturer.

Impact With Aluminium Cookware

As granite composite sinks are very hard, dragging softer aluminium cookware across the sink may cause some aluminium streaks, so this should be avoided.

Leave Food Stains To Sit

Certain types of food & liquids can stain your composite sink very easily, so don't be tempted to leave these stains for clean up at a later date. You should be particularly careful of fruit juice, tea and coffee stains.


If You're Unsure - Check With Your Manufacturer!

Different sinks are built to withstand different things, so it’s best to check with your manufacturer about the best way to look after your sink.

Even though they are higher maintenance than other kitchen sinks, granite composite sinks are a great choice thanks to their long-life, high durability and choice of colours. 

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