The Ultimate Guide to Cleaning Any Composite Sink

I find my granite composite sink to be an absolute pain! But I know you have not come here to hear me moan about it.

You are here because you share my pain, or maybe you are about to buy one (don’t do it), and you need a proper guide for cleaning them.

Consider this your ultimate guide to cleaning a composite granite sink.

Before I share my tips, I think it’s important to know what composite sinks are made of. Although there are different types, makes, materials, and strengths, composite sinks are generally made from a mix of quartz, granite, and acrylic resins. You can read more about its composition here.

ways to clean a composite sink

That being said, whatever advice you get on how to clean your sink, always remember the key materials: granite and resin. With that in mind, you can decide what is not safe for those materials.

In this post, I will cover:

  1. Daily Cleaning: What to use to clean your composite sink daily
  2. Stain Removal: How to get rid of all kinds of stains on the surface of your sink
  3. Specific Care Methods: Here, I cover the best tools and methods for making a black, white, or grey composite sink look like new
  4. What To Avoid: The daily practices to keep your sink looking new.

Daily Cleaning for a Sparkling Composite Sink

Composite sinks need to be cleaned every day to keep them looking good. This is because they are not low-maintenance, as I mentioned earlier.

The best way to keep your kitchen sink looking great is to have a daily cleaning routine. We tend to clean ours every evening before bed, and that has worked well for us. Here are the steps to clean your sink daily:

Step #1 Clear

 Clear the sink of all food or plates. This should go without saying, but it’s important to mention.

Step #2 Clean

Clean the sink with mild dish soap and a non-scratch sponge. Composite sinks are prone to stains, so if you see any that don’t come off with the soap, use a bit of baking soda or a product like The Pink Stuff. I’ll cover stain removal in more detail below.

Wet the sponge with warm water, then squirt some soap on it. Rub the soapy sponge over the entire sink surface, making sure to get the sides and corners. Be sure to apply a little extra pressure.

cleaning composite sink

Step #3 Spot Clean

Spot clean any stains. Composite sinks are prone to stains, so if you see any that don’t come off with the soap, use a bit of baking soda or a product like The Pink Stuff over any food stains or mineral deposits. I’ll cover stain removal in more detail below.

Step #4 Rinse and Wipe

Rinse the soap off the sink thoroughly, then wipe it dry with a paper towel or soft cloth. It’s important to wipe the sink dry every day, as water spots can leave stains on the surface of the sink.

Removing Tough Stains

As promised, here are some ways to get rid of those stubborn stains that you’ll inevitably get on your sink’s surface.

Composite sinks are high-maintenance, so don’t let anyone tell you otherwise. When I read the words “durable and stain resistant” on a composite sink manufacturer’s page, I let out a light chuckle. Nothing could be more stain-prone than a composite sink, especially if you have a white one like I do.

If you’re considering buying a composite sink and you’re turned off by now, I must be doing a very good job. 😉

Here are 5 ingredients that I’ve tested and trusted to tackle my composite sink:

#1. The Pink Stuff

the pink stuff

I love this pink paste. We keep a large tub under our kitchen sink to tackle tougher stains. 

  • To use, simply dip a damp sponge into the paste and scoop up a generous amount. 
  • Scrub the stained area in circular motions 
  • Rinse and dry 

The Pink Stuff will break down the stain and leave your sink looking new. It is a powerful cleaner that is gentle enough for everyday use. If this product is not available where you live, here are six other alternatives.

#2. Oxygen Bleach

oxygen bleach

I started using oxygen bleach by accident and I could scream about how much I love using this for my composite sink. It is one of the only products that actually whitens it and makes it look brand new. 

  • To use this, wash your sink like normal
  • Then sprinkle a generous amount all over the surface of your sink and pour hot water to activate it. Although oxygen bleach works really well with cold water, hot water activates it and makes it work even faster. 
  • Once that is done, scoop a small amount on a sponge and make a paste. press this paste gently on all the sides of the sink. 
  • Let the oxygen bleach sit for 2-3 hours or preferably overnight. 
  • Rinse off and admire your sparkling clean sink.

If you are hearing about this solution for the first time, I am about to become your new best friend. It works like magic. Try it and thank me.

#3. Cream Cleaner

cream cleaner

Although this is mostly used in bathrooms, cream cleaners are designed to remove dirt from a variety of surfaces. It is a multipurpose surface cleaner that will get rid of mild stains in your composite sink. 

  • To use, simply pour some directly in the sink or on a sponge and scrub as usual. 
  • Repeat if the stains persist 

Cream cleaners are typically non-abrasive, so they are safe to use on composite sinks without damaging the surface.

#4. Bar Keepers Friend

Bar keepers friend

This is one of the cleaning products that I always have in my arsenal because it removes tough rust stains and grime. This is why I use it on my sink.

  • To use this, put on some gloves. If using the powder version, sprinkle a small amount of powder over the sink and wet a non-abrasive sponge. 
  • Rub in circular motions around the sink and add a little more water if needed
  • Let it sit for a few minutes before rinsing off.

I don’t use this very often because I am not sure what the effect of long term use might be. 

#5. Milton liquid or tablets


Another product I discovered are these Milton tablets or liquid. They come in tablet or liquid form and are used to sterilise baby bottles but they work really well to whiten and disinfect your composite sink. 

  • To use Milton, simply clean the sink as usual, then pour the Milton liquid or tablets into the sink and let it sit for a few hours.
  • Better yet, let it soak in the sink overnight. It truly whitens and sterilises the sink. 

Whilst I am against using neat bleach as it can damage your sink over time, Milton only contains 1% bleach and also contains salt. This makes it such that the bleach is able to work but not concentrated enough to cause permanent damage to the resin. 

#6. Baking Soda

Baking soda

The penultimate product worth mentioning is baking soda. I must say that it is better suited to light stains. It is not always as effective as some of the other products I have listed like The Pink stuff. 

  • To use baking soda, sprinkle some into the sink directly or onto a damp sponge. 
  • Scrub the stained area in circular motions.
  • Rinse and dry with a soft microfibre cloth.

The gritty nature of baking soda will provide a light soft scrub over the stains in your sink and clean it. 

#7. Citric Acid

Citric acid

The last product in my arsenal is none other than citric acid. I love it because it does such a great job of removing stains and whitening, whether in the toilet or for any other cleaning job you might have. 

  • To use citric acid, sprinkle some over the base of your sink and pour some hot water. 
  • Let it sit for a few hours or overnight and rinse. 
  • Rinse and dry with a soft microfibre cloth.

I know you must be wondering why vinegar didn’t make this line up. Vinegar is great for getting rid of the limescale but not more effective than the other solutions listed for whitening it. 

Colour Specific Cleaning Tips

When it comes to maintaining a clean composite sink all year round, having a cleaning routine is essential.

I have chosen to demonstrate the routine for the two most popular colours: white and black. So, select the routine that best matches the colour of your sink.

For instance, if you have a light grey sink, use the routine for the white composite sink, and if yours is dark grey, follow the black sink routine.

How to clean a black composite sink


  • Clean daily with warm soapy water.
  • Use “The Pink Stuff” to get rid of stains.
  • Rinse and dry with a cloth.


  • Clean as usual and remove any stains.
  • Quickly attack any limescale deposits with vinegar, citric acid, or any limescale remover of your choice. Pay special attention to the areas around the base of the tap, where limescale tends to settle the most.


  • Clean as usual and use a stain remover.
  • Dry with a soft cloth.
  • Polish with cutting board oil, Danish oil, or any wood-safe oil along with some paper towels. If you don’t have these oils, you may use a small amount of mineral oil like baby oil. Avoid using food-grade oils like olive oil as they can go rancid. The oils help repel water and prevent limescale stains.

How to clean a white composite sink


  • Clean daily with warm soapy water.
  • Use “The Pink Stuff” to get rid of stains.
  • Rinse and dry with a cloth.


  • Clean as usual and use some oxygen bleach or Milton to whiten and improve the appearance.


  • Clean as usual and use a stain remover. Don’t forget the corners.
  • Dry with a soft cloth.
  • Whiten with Milton or oxygen bleach, rinse, and dry with a soft cloth.
  • You may polish if you prefer, but it’s not entirely necessary for white composite sinks.

How To Maintain Your Composite Sink

Here are some tips/rules to follow if you want to keep your sink looking good all year and lasting a long time:

  • Use a protective grid to avoid scratches on the base of your sink.
  • Consider sealing it every year
  • Don’t leave your sink wet. Water can contain minerals that, when left to dry, will begin to stain your sink.
  • Don’t let stains have a chance to settle. The moment you have any kind of stain, whether it’s coffee or the base of your pot, clean it. Stains accumulate and become harder to remove.
  • Avoid heat. While hot water is fine in the sink, hot pans may have a higher temperature and can damage the resin over time. So, try to let your pan cool before throwing it in the sink.
  • Lastly, don’t drop knives in the sink. I speak from experience; knives can scratch and chip off the base of your sink.


In conclusion, caring for and cleaning your composite sink doesn’t have to be a daunting task if you follow the right steps and use the appropriate products. If all this sounds like a lot of work, I am glad I have been able to put you off buying a composite sink. Instead, consider stainless steel sinks or even ceramic sinks as they are far easier to maintain.

Remember that composite sinks are typically made from a combination of quartz, granite, and acrylic resins, so use cleaning products that are safe for these materials.

You can read about cleaning quartz here.

Daily cleaning is critical to prevent stains and buildup, and be diligent in drying the sink to avoid water spots and mineral deposits.

For tough stains, you can use products like The Pink Stuff, oxygen bleach, cream cleaner, Bar Keepers Friend, Milton, baking soda, and citric acid.

If you have a black composite sink, using baby oil or cutting board oil can help keep it looking new.

To maintain your sink’s appearance, consider using a protective grid to prevent scratches and avoid dropping knives in it, as they can scratch or chip the sink’s surface.

In the end, if you are stuck with a composite sink like I am, maintaining and cleaning it doesn’t have to be an overwhelming chore. I hope I have armed you with all the best tips to clean and maintain the composite sink in your kitchen.

Happy Cleaning!

Other Posts You May Like:

6 Minimalist Cleaning Supplies You Need (That Don’t Include Baking Soda)

7 Genius Steps to Organise Cleaning Supplies Under the Sink

Best Guide for Cleaning and Maintaining Quartz Countertops 


Hey you, I’m Torera

Hey there! I am Torera, a home care and cleaning enthusiast with a mission to make cleaning as fun and easy as possible for women like you. As someone who had to learn everything from scratch, I have the mindset of a beginner and know exactly how to take you from A to Z. Let us ditch the overwhelm and create a space that is clean, cozy, and totally you!