Acrylic tubs are a popular choice in modern bathrooms thanks to their sleek design, lightweight structure, and budget-friendly pricing. But their unique material composition—a resin-coated surface over a polymethyl methacrylate (PMMA) base—means they require special care to maintain their shine and function over time.
Acrylic is softer than porcelain or cast iron, and it’s more sensitive to heat and chemicals. So, what exactly should you avoid using on your acrylic tub? Let’s dive into the must-know don’ts of acrylic tub maintenance.
1. Avoid These Cleaning Tools: Prevent Surface Scratches
Acrylic has a relatively low hardness level (Mohs hardness 2–3), meaning it’s prone to scratching. That’s why certain cleaning tools are a no-go:
- Steel wool or stiff-bristle brushes: The tough fibers or metal strands can leave visible scratches on the surface. Over time, these can roughen the finish and strip away the protective resin layer.
- Sharp metal tools: Razor blades, screwdrivers, scrapers—even light contact with these can leave deep gouges or even cause cracks.
- Abrasive pads or sandpaper: Scouring pads with gritty particles may seem helpful for tough stains, but they’ll wear down the tub’s glossy finish.
Better Alternatives: Use a soft sponge, microfiber cloth, or a soft-bristle brush specifically designed for delicate surfaces. Always clean gently to avoid physical damage.
Further Reading: Best Way to Clean an Acrylic Bathtub
2. Avoid These Chemicals: Protect Against Corrosion and Discoloration
The resin layer on acrylic tubs is sensitive to harsh chemicals. Using the wrong cleaners can cause irreversible damage such as fading, dullness, or even etching.
- Acidic cleaners: Products like toilet bowl cleaners (with hydrochloric acid), tile cleaners (with oxalic or hydrofluoric acid), and rust removers can eat away at the tub’s surface, leaving white spots or pitting.
- Strong alkaline cleaners: Heavy-duty degreasers or drain openers containing sodium hydroxide can weaken the tub over time, making it brittle and more prone to cracking.
- Bleach and chlorine-based products: Disinfectants like bleach or chlorine powder can discolor the tub, especially white models, and destabilize the acrylic material.
- Solvent-based cleaners: High-concentration alcohol, gasoline, or paint thinners (like acetone or banana oil) can dissolve the resin layer, leading to cracks and cloudiness.
Safer Alternatives: Use neutral pH cleaners, specially formulated acrylic tub cleaners, mild baby soap, baking soda solution (for gentle stain removal), or diluted citric acid (for limescale). Always rinse thoroughly after cleaning.
Further Reading: Acrylic Bathtub Cleaner Selection Guide
3. Avoid High Heat: Prevent Warping and Discoloration
Acrylic has a heat deformation point of around 160–195°F (70–90°C). Exposure to high temperatures can lead to permanent warping, discoloration, or even melting.
- Pouring boiling water directly: Dumping 212°F (100°C) water straight into the tub can cause sudden temperature shock, resulting in bubbling, warping, or discoloration—especially near the base or edges.
- Placing hot items nearby: Electric kettles, space heaters, or heat lamps placed too close can cause yellowing or softening of the tub’s surface.
- Open flame contact: Candle sparks or direct flame (e.g., from a lighter) can scorch or melt the acrylic, leaving permanent burn marks.
Safety Tips: Always start with cold or lukewarm water when filling the tub, then slowly add hot water. Keep hot appliances at least 20 inches away from the tub. If using a bathroom heat lamp, limit usage time and keep a safe distance.
4. Avoid Sharp or Staining Items: Keep the Surface Clean and Intact
Everyday objects can also harm your acrylic tub if you're not careful.
- Sharp or hard objects: Items like metal racks, glass bottles, ceramic containers, or even pet claws can scratch the tub surface. Placing hard non-slip mats without soft backing can also cause abrasion during use.
- Staining items: Dark bath sponges, herbal bath soaks, hair dye, or low-quality bath bombs with synthetic coloring may stain the porous surface, especially on lighter-colored tubs.
- Heavy impacts: Dropping a full water bucket, tools, or tiles into the tub—or stepping or jumping on the tub edge—can cause cracks, especially at stress points like corners and edges.
Precautionary Tips: Use soft non-slip mats with suction cups. Avoid leaving staining items in the water for long. Handle heavy or sharp items with care and avoid storing them inside the tub.
5. Avoid Improper Usage: Preserve the Structure and Safety
Using your tub the wrong way can shorten its lifespan—and potentially lead to accidents.
- Overloading: Most acrylic tubs have a weight limit of around 440–660 lbs (200–300 kg). Avoid letting multiple adults use the tub simultaneously, or placing heavy objects like washing machines or large planters inside.
- Letting water sit for too long: Standing water—especially in hard water regions—can leave stubborn limescale buildup and weaken the silicone sealants between the tub and walls, increasing the risk of leaks.
- Rough handling: Kicking the tub edge, prying open drain covers with tools, or applying uneven pressure can result in cracks, leaks, or loose fittings.
Best Practices: Limit use to one or two users at a time. Drain and wipe down the tub after use. Use moderate force during cleaning. Regularly inspect the drainage and sealing areas, and repair issues early.
Ending
Caring for your acrylic tub all comes down to treating it gently. Avoid scratches, steer clear of harsh chemicals and high heat, and respect its structural limits. With regular gentle cleaning and mindful use, your tub can last 8–10 years or more—delivering warmth, comfort, and style.
Remember: Prevention is better than repair. Take care of the little details now, and your acrylic tub will continue to look stunning for years to come.
If your tub already has light surface damage, check out our guide: Complete Guide to Repairing an Acrylic Tub
