For homeowners considering the purchase of an acrylic bathtub, one common question is: "Will an acrylic bathtub turn yellow over time?" For those who already own one, the question becomes: "How to whiten a yellowed acrylic bathtub?" These questions reflect a real concern—despite acrylic's popularity for its sleek look and durability, it can lose its pristine appearance over time. Yellowing is a particularly frustrating issue, especially when a once-bright tub starts to look aged and stained.
Dealing with yellowing on acrylic bathtubs can be both straightforward and tricky. The challenge lies in the glossy finish of acrylic, which restricts cleaning options. Unlike solid-surface tubs, which can be sanded to remove stains, sanding acrylic can damage the surface, making it rough and more susceptible to dirt. However, if the yellowing is caught early, it can often be remedied with simple, effective cleaning methods.
Why Does an Acrylic Bathtub Turn Yellow
Acrylic bathtubs turn yellow mainly due to oxidation—a reaction triggered by prolonged exposure to air, moisture, UV light, and certain cleaning agents. The key causes include:
- Lack of Regular Cleaning
Soap scum, body oils, and mineral deposits build up over time. If not cleaned regularly, these substances can contribute to the yellowing of the surface.
- Sunlight Exposure
UV rays break down the acrylic material, causing it to oxidize and yellow. This is particularly common in bathtubs placed near windows or areas with direct sunlight.
- Harsh Cleaning Products
Using strong acids, bleach, or abrasive cleaners can damage the acrylic’s protective layer. Once compromised, the surface becomes more porous, making it more prone to stains and discoloration.
Best Solution for Whitening Acrylic Bathtubs
Start with Toothpaste
Toothpaste is a surprisingly effective and gentle cleaner for acrylic bathtubs. It contains mild abrasives that help scrub away stains without damaging the tub’s surface. Here’s how to use it:
- Drain all water from the bathtub.
- Squeeze a generous amount of white toothpaste onto a soft cloth or sponge.
- Gently scrub the surface of the tub, focusing on the yellowed areas. Apply extra pressure where necessary.
- Rinse thoroughly with clean water.
Toothpaste can help restore the shine and whiteness of mildly yellowed areas. It’s also safe and inexpensive. If you don’t have toothpaste, shampoo or body wash can work as alternatives, though they may not be as effective.
Use White Vinegar or Citric Acid for a Deeper Clean
If toothpaste doesn’t yield noticeable results, it’s time to try a more powerful, yet natural method: vinegar or citric acid.
Both are acidic, which makes them effective at dissolving mineral buildup and grime, but still gentle enough for acrylic surfaces. Here's how to do it:
- Drain the bathtub and ensure the surface is dry.
- Apply a moderate amount of white vinegar or dissolve a few tablespoons of citric acid powder in warm water and apply it to the yellowed areas.
- Let it sit for 10 to 15 minutes to break down stubborn stains.
- Scrub the surface with a soft sponge or cloth soaked in vinegar or citric acid solution.
- Rinse thoroughly with water.
However, Acrylic is particularly sensitive to strong acidic or alkaline substances, such as toilet bowl cleaners, bleach, or powdered scouring agents. These products may appear to work at first but can quickly damage the surface, making future stains even worse. For this reason, never use toilet cleaner, bleach, ammonia, or baking soda with a rough sponge or brush.
Professional Cleaning Services
If your bathtub remains yellowed after multiple cleanings, and especially if the discoloration is severe or long-standing, it might be best to seek professional help. There are companies that specialize in bathtub restoration and cleaning. They have specialized tools and cleaning agents that are both effective and safe for acrylic.
Professional services might cost more, but they can restore your bathtub’s appearance with precision and reduce the risk of damage. It’s a worthwhile investment, especially for high-end or built-in bathtubs that are difficult to replace.
Measures to Keep Your Acrylic Bathtub White for a Long Time
Preventing yellowing is easier than fixing it. Here are several tips to help you maintain your acrylic bathtub’s pristine condition:
Clean Weekly with a Soft Sponge
We recommend cleaning your acrylic bathtub at least once a week. Sponges are ideal because they’re highly absorbent and won’t scratch the surface, unlike rough cloths or scrubbing brushes.
Avoid using old rags or anything with a coarse texture, as these can wear down the acrylic’s protective coating over time.
Dry the Surface After Every Use
After cleaning—or even after bathing—use a dry, soft towel to wipe down the surface. This removes excess water and prevents mineral deposits and soap scum from drying on the surface, which can lead to staining and yellowing.
Avoid Direct Sunlight
If possible, position your bathtub away from windows or use UV-protective film or curtains to block sunlight. Direct UV exposure speeds up the oxidation process and leads to faster yellowing.
Use Gentle Cleaners Only
Stick to neutral pH or mild cleaning agents. Many store-bought bathroom cleaners contain harsh chemicals that can be too aggressive for acrylic surfaces. Opt for specially formulated acrylic-safe products if available.
Further Reading: Acrylic Bathtub Cleaner Selection Guide
Ending
Acrylic bathtubs are a popular choice thanks to their durability, sleek design, and affordability. However, like all bathroom fixtures, they require regular care to maintain their appearance. While yellowing can be frustrating, it’s not irreversible—especially if caught early. By using common household products like toothpaste, vinegar, or citric acid, you can often restore your tub’s white shine without calling in the pros.
That said, prevention is always better than cure. Regular cleaning, avoiding harsh chemicals, and protecting your tub from direct sunlight will go a long way in preserving its beauty for years to come.
So, if your acrylic bathtub is beginning to show signs of yellowing, don’t panic—just grab a tube of toothpaste and start scrubbing. Your bathtub can shine like new again with just a little effort.
