8 Easy Tips: How to Clean a Fiberglass Sink!

Using a sink is really helpful. We could clean dishes or vegetables with running water easily. However, you must know how to clean a fiberglass sink properly!

A fiberglass sink is a countersink made of fiberglass, but it is far more difficult to scratch and stain than usual metals – stainless steel, copper, brass, and others.

The countertop has a special enamel coating that resists damage from the sink. Enamel is a tough material that has a layer on the surface that prevents damage from high temperatures and water.

Fiberglass sinks are great for in the kitchen. It’s very scratch resistant, stain resistant, it even gets shiny.

The downside to a fiberglass sink is that it doesn’t hold as much heat as other materials like cast iron or stainless steel. It can get very slippery as well.

Sinks made from fiberglass are very popular in homes and industries because they can be used for everything from washing vegetables to cleaning dishes.

However, to keep it last longer, you need to know the right treatment. Let me show you how to clean a fiberglass sink.

What you should prepare before cleaning a fiberglass sink


1. Do not use a hard sponge or wire brush

When you are cleaning your sink, it’s important to avoid using wire brushes or hard sponges. You should always use a soft sponge or soft rag when cleaning it.

Using a hard sponge or wire brush to clean your fiberglass sink can possibly scratch the sink and make it look old and dingy.

2. Wear your gloves

Cleaning your fiberglass sink with gloves will protect your skin. It’s important to be careful when you handle certain cleaning products, and you don’t want to expose your skin to chemicals. Wearing gloves will keep the chemicals off your hands and help prevent that reaction your skin doesn’t like. Wear them!

How to clean a fiberglass sink

1. White vinegar

You can clean a fiberglass sink with a mixture of vinegar and water.

Vinegar is made by fermenting grains, fruits, and vegetables. It’s commonly used in food as a taste enhancer, preservative, or both. The acetic acid of vinegar will get rid of dirt and grime instantly.

First, combine equal parts vinegar and water. Fill the spray bottle with it. Then, spray the mixture onto the fiberglass sink’s surface. Scrub it gently using a rag.

If you’re dealing with tough stains, scrub them with an old toothbrush. The stains will quickly come out, and your sink will be cleaner than it has ever been!

After that, rinse the sink with plain water. Last, dry it with a microfiber cloth.

You can also use white vinegar to clean a fiberglass tub that has yellowed.

2. Lemon water


Lemon water is a fine alternative cleaning agent. It contains citric acid, which is a great way to clean the surface of your fiberglass sink and it also helps to brighten the color without forcing you to scrub the hell out of it.

Squeeze a lemon and warm water in a spray bottle. Then, spray the mixture into the fiberglass sink.

Then, start scrubbing with a soft sponge. Use an old toothbrush to wash a sticky stain. Then, rinse the fiberglass sink with water, dry it, and you’re good to go!

3. Baking soda


You can use baking soda to clean a fiberglass sink. It has abrasive particles and will remove the dirt and gunk easily.

First, fill half the sink with warm water. Then, add 4 tablespoons of baking soda and leave it for 1 hour. 

Then, scrub the whole sink with a sponge. You can use an old toothbrush to remove the residue. Then, empty the sink and rinse it with plain water. Last, wipe the excess with a microfiber cloth.

You can also use baking soda to clean a granite composite sink.

4. Hydrogen Peroxide

Using hydrogen peroxide to clean the fiberglass sink is a great idea. You can also use it to clean many surfaces in your house.

First, pour the hydrogen peroxide into the fiberglass sink. Leave it for 30 seconds. Then, scrub the fiberglass gently with a sponge or brush until all dirt and stains have been removed.

After that, make sure to thoroughly rinse the sink with water. Finally, wipe it down with a microfiber cloth.

When working with hydrogen peroxide, always use protective equipment such as gloves and a mask.

6. Dishwashing soap


Dishwashing soap can be used to clean fiberglass sinks efficiently and effectively.

Dishwashing soap is designed to remove stubborn grease, something that fiberglass washers often have to deal with. Dishwashing soap will reduce your scrubbing time and give your sink a super shiny surface!

To clean fiberglass, start by mixing a cup of dishwashing soap with hot water in a container.

Next, dip a sponge into the mixture and scrub it to the whole fiberglass surface. Then rinse with plenty of warm water. Last, wipe it with a microfiber cloth.

7. Coke drink

If you want to clean a fiberglass sink, you can use a coke drink. Coke contains citric acid, and the citric acid will help take off those stains.

Dissolve a regular cola drink into your sink with a mixture of warm water, leave it for 30 minutes, rub it with an old toothbrush and rinse the surface.

Once this process is complete, you can rinse the tub again with a mixture of water and vinegar.

8. Combination of vinegar and baking soda

The best way to clean a fiberglass sink is by using a combination of vinegar and baking soda.

The combination will help dissolve the rust off the surface, without leaving scratches. Running water will take away the cleaning solution.

With a mixture of one cup of each, and again make sure that the mixture is stirred completely.

Pour the mixture onto the sink, let it sit for several minutes, then scrub with a sponge. Next, rinse the sink with plain water and wipe it with a microfiber cloth.

You can also use vinegar and baking soda to neutralize the plastic smell in storage container.

9. Chemical liquid cleaner

You can clean and polish the sink with a fiberglass cleaner. It’s easy to find in a retail store’s housekeeping department.

First, spray the entire fiberglass sink with the chemical liquid cleanser. Leave it for 15 minutes. Then,  scrub the sink with a damp sponge. After that, give everything a good rinse with plain water.

Always read the manual before using anything. You can ruin your sink if you use the wrong method or product.


How do you make a fiberglass sink look new?

If you have a fiberglass sink that looks old and grimy, don’t worry. It’s very easy to perfectly clean your sink because fiberglass is so easy to clean. All you need is the right method, including warm water and dishwashing liquid, and a little bit of elbow grease.

How do you shine a fiberglass sink?

If you want to shine fiberglass sinks, use a white surface brightening product.  It’s available at the local department shop. It works well for polishing fiberglass sinks and makes the old ones look like new. Also, the material leaves no streak on the fiberglass surface.

Can fiberglass be cleaned?

Yes, the fiberglass surface can be cleaned with many ingredients. However, it is best to use natural material in the first place because it leaves no chemical residue.


Calling all homeowners! Don’t know how to clean a fiberglass sink? Do not worry!

Let me summarize how to clean a fiberglass sink in a nutshell!

  1. White vinegar
  2. Lemon water
  3. Baking soda
  4. Hydrogen Peroxide
  5. Dishwashing soap
  6. Coke drink
  7. Combination of vinegar and baking soda
  8. Chemical liquid cleaner

Do not hesitate to leave a comment!