How to Whiten Plastic or Fiberglass Tubs & Showers

Updated February 21, 2017

Tubs and showers made of fibreglass and plastic are easy to clean. However, white surfaces can dull over time from residue development caused by soap scum, dirt and hard water. To effectively clean the tubs and showers, you simply need to use a few simple cleaning ingredients that will remove all of the residue while also whitening the surface.

Fill a spray bottle with 1 cup oxygen bleach, 3 tbsp dish soap, and 2 cups water. The oxygen bleach will safely clean and brighten, while the dish soap will cut through soap scum and residue.

Spray this solution onto the entire surface of the shower, and let sit for 10 minutes.

Moisten a nylon scouring pad with hot water, and scrub the shower floor and walls. A nylon scouring pad will scrub away residue without scratching the surface of the plastic or fibreglass.

Repeat as needed until the area has been whitened to your satisfaction, then rinse the area with fresh water.


Spray this solution onto the shower or tub after each use, when possible, to prevent residue from building on the surface.

Things You'll Need

  • Oxygen bleach
  • Dish soap
  • Nylon scouring pad
  • Spray bottle
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About the Author

Mel Frank is a professional freelance writer with over 15 years of writing experience. She has completed a wide variety of writing assignments for a number of publications that include CNN and various websites. Frank received a Bachelor of Fine Arts from a prestigious university in Pennsylvania.