How to Clean a Composite Sink: 7 Cleaning Methods & 13 Tips

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Composite sinks are becoming increasingly popular among homeowners. They’re durable, affordable, and easy to install.

But what do you do when you need to clean one?  What should you avoid?

Here’s what you should know about cleaning composite sinks:

1. Clean Composite Sinks Regularly

Composite sinks are made up of two materials: resin and fiberglass. Resin is a type of plastic that comes in many different colors. Fiberglass is a glass-like material that makes up the actual sink. Both materials are porous, meaning they absorb water and dirt easily.

To prevent buildup, wash your sink after every use. Use soap and warm water to remove any food particles and grime. Rinse well and let dry completely before storing.

2. Clean Composite Sinks With a Sponge

Sponges are ideal for cleaning composite sinks because they don’t leave residue behind. To clean your sink, soak a sponge in warm water and then wring out excess moisture. Gently wipe down the sink using the wet sponge.

3. Clean Composite Sinks Using a Spray Bottle

Spray bottles are another effective method for cleaning composite sinks. Fill the bottle halfway with warm water and add 1/8 cup of dishwashing liquid. Shake vigorously until bubbles form. Then spray onto the surface of the sink and wipe away with a soft cloth.

4. Clean Composite Sinks with Vinegar

how to clean composite sink

Vinegar is an inexpensive and natural alternative to commercial cleaners. Mix equal parts white vinegar and water in a spray bottle. Add one drop of dishwashing liquid per gallon of solution. Shake vigorously and spray onto the surface of your sink. Wipe away with a soft cloth or paper towel.

5. Clean Composite Sinks Without Chemicals

There are several nonchemical methods for cleaning composite sinks. One way is to mix baking soda and water together in a bowl. Dip a sponge into the mixture and scrub the sink. Repeat this step until the sink is clean.

Another option is to fill a bucket with warm water and add 2 cups of salt. Let’s sit it overnight. The next morning, rinse the sink thoroughly and let the air dry.

6. Clean Composite Sinks After Each Use

how to clean composite sink

After each use, rinse the sink with warm water and allow it to air-dry. This helps prevent buildup. If you notice any stains, try rubbing them with a little bit of lemon juice. It can help lift stains.

7. Clean Composite Sinks Before Vacation

Don’t let stains sit around on a composite sink.

Before leaving town for any extended period (week or more), clean your sink with a mild detergent and warm water. Make sure to rinse well and let it air dry completely.

Cleaning Composite Sinks: Best Practices & Tips To Keep In Mind

  1. Do not use abrasives or harsh chemicals to clean a composite sink.
  2. If you notice any discoloration, streaks, or spots on the sink, immediately stop using it and contact your supplier for assistance.
  3. Always test a small area first before attempting to clean the entire sink.
  4. After cleaning, rinse the sink well under running water until no residue remains.
  5. Store the sink upside down when not in use.
  6. Remove the composite sink from its packaging prior to installation.
  7. Follow the manufacturer’s directions regarding proper installation.
  8. Make sure the composite sink is level.
  9. Ensure there are no obstructions within 3 feet of the sink.
  10. Check the plumbing connections for leaks.
  11. Ensure the drain is clear and free of debris.
  12. Ensure the faucet has been properly installed according to the manufacturer’s specifications.
  13. Ensure the composite sink is placed at least 18 inches away from heat sources (e.g., radiators, stoves, fireplaces).

What to Avoid When Cleaning a Black Composite Sink

how to clean composite sink

Avoid using abrasive products such as scouring pads, steel wool, sandpaper, etc. These materials may scratch the finish of the sink.

Do not use bleach or other strong chemical cleaners. They could damage the finish of the sink if used improperly.

Do not use a pressure washer to clean a black composite sink.

Use only mild soap and water to clean a black composite kitchen sink.

Never use ammonia, chlorine, turpentine, or petroleum solvents to clean a black composite bathroom sink.

Never use an electric toothbrush to brush your teeth in a black composite sink. You risk damaging the surface.


Q: What kind of material is a composite sink made of?

A: A composite sink is made of a combination of polyester resin mixed with fiberglass.

Q: Is the composite sink dishwasher safe?

A: Yes, most composite sinks are dishwasher safe.

Q: Can I use a regular sponge instead of a nylon scrubbing pad?

A: No, you cannot use a regular sponge. Use a nylon scrubbing pad instead.

Q: Can you use a toothbrush to clean the composite sink?

A: No. Toothbrushes are not recommended for use with composite sinks due to the potential scratching of the sink.

Q: Can the composite sink be used for washing dishes?

A: Yes. It is suitable for washing plates, bowls, cups, glasses, etc.

Q: Can a stainless steel sink be used to wash dishes?

A: Stainless steel sinks are not designed to withstand the rigors of daily household usage without getting damaged over time and showing it. They are generally used for commercial applications such as restaurants and food processing plants.

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