How to Clean a Composite Stone Bathtub?

Composite stone has become an increasingly popular material for bathtubs due to its durability, heat resistance, and aesthetically pleasing finish. However, without proper cleaning and maintenance, composite stone is still susceptible to staining, soap scum buildup, and discoloration over time. Establishing a regular cleaning routine is crucial for preserving the appearance and longevity of your composite stone bathtub. This article will provide a comprehensive overview of how to effectively clean a composite stone bathtub.


Understanding Composite Stone Bathtubs


Composite stone refers to a mixture of crushed stone combined with resins and pigments. Quartz is typically the primary crushed stone used. The resin binds the stone particles together to form a durable, non-porous material that maintains the appearance of natural stone. Composite stone withstands heat, scratches, and stains better than many natural stone surfaces. These favorable properties make composite stone an ideal choice for bathtubs. Proper cleaning is still required to keep a composite stone bathtub looking like new.


General Cleaning Guidelines


Routine cleaning of a composite stone bathtub involves wiping down all surfaces with a soft cloth or sponge, warm water, and a mild pH-neutral cleaner or soap after every use. Acidic or abrasive cleaners should always be avoided as they can etch and dull the finish over time. Similarly, allowing dirt, residue, and soap scum to linger can lead to more stubborn stains. Establishing consistent cleaning habits is key to minimizing more extensive cleaning efforts down the road.


Step-by-Step Cleaning Process


Preparing the Bathtub


Before cleaning, remove any bath mats or accessories from the tub. Have a soft microfiber cloth, mild liquid dish soap or stone cleaner, and a plastic bristle scrub brush ready.


Removing Surface Debris


First, rinse down all surfaces with warm water to remove loose dirt and debris. Target any visible stains or soap scum by gently rubbing with a damp cloth. Avoid abrasive pressure.


Addressing Stubborn Stains


For light stains and soap scum that linger, apply a small amount of liquid dish soap or specialty stone cleaner directly to the affected area using a soft cloth or sponge. Gently scrub using a plastic bristle brush or dobie pad specifically designed for composite stone. Rinse thoroughly.


Hard Water Stain Removal


For tough hard water stains and calcium deposits, use a specialty hard water stain remover made specifically for composite stone surfaces. Consult the manufacturer’s recommendations and test on an inconspicuous area first. Rinse thoroughly afterwards.


Final Rinse and Dry


Rinse all surfaces thoroughly with clean warm water to remove any soap or cleaning product residue. After water drains, wipe down the entire tub with a soft microfiber cloth. Thorough drying helps prevent soap scum buildup and mineral deposits.


Tips for Specific Cleaning Challenges


Removing Soap Scum and Hard Water Stains


The warm, humid environment of a bathroom makes bathtubs prone to soap scum accumulation and hard water staining. Address any buildup immediately before it has a chance to harden and become more stubborn to remove. Use a plastic scrub brush and dedicated soap scum cleaner or hard water remover. Pay special attention to gaps along seams.


Eliminating Stains and Discoloration  


For light stains or surface discoloration, sometimes a baking soda and water paste applied with a soft cloth can help lift these from the surface. More persistent stains may require a vinegar and water solution. However, acid-based cleaners should be used sparingly and thoroughly rinsed. Consult a stone care professional if stains remain.


Preventing Mold and Mildew


To deter mold and mildew growth, maintain cleanliness and dryness in the tub enclosure. After each use, wipe down all surfaces and leave the door open to allow proper airflow to dry damp areas and prevent moisture buildup. Apply an antimicrobial stone sealant that guard against microbes.  


Maintenance and Preventative Measures


Get into the habit of wiping down your composite stone bathtub with a squeegee or soft cloth after each use to prevent soap scum and mineral deposit accumulation. Every 3-4 months, reseal the surface with an antibacterial stone sealer formulated for composite materials. This adds a protective layer against moisture damage and staining when applied properly. Consider scheduling professional deep cleaning and resealing annually.


Additional Care Considerations  


Take care to avoid exposing your composite stone tub to excessively high temperatures. Allow bath water to return to room temperature before draining. Hot drain water can compromise sealants. Avoid abrasive tools or harsh scrub pads during cleaning. Use non-acidic, stone-safe cleaners only and ensure rinsing any cleaning products thoroughly after use. Always keep chemicals stored securely away from the tub area.


Comparison to Other Bathtub Materials


While soap scum, hard water stains, and discoloration can affect most bathtub surfaces, composite stone requires specialized cleaning considerations to maintain its signature sleek look. Porcelain enamel and acrylic bathtubs tend to show damage less, but are more prone to chipping and denting over time. Fiberglass can become dull, stained, and cracked more readily. Composite stone offers a durable surface both structurally and aesthetically when cleaned properly.  




Regular cleaning and maintenance is key for preserving the like-new appearance and longevity of a composite stone bathtub. While durable, composite stone still requires non-abrasive, stone-safe cleaners and gentle scrubbing to prevent buildup and staining. Establishing consistent surface cleaning after use combined with periodic resealing and professional maintenance will properly care for a composite stone bathtub. With the proper cleaning habits, your composite stone bathtub can remain beautiful and functional for many years of bathing enjoyment. Implement these best practices and techniques for keeping your composite stone tub sparkling.


Jiaxing Miluo Smart Home Co., Ltd. is a distinguished manufacturer specializing in artificial stone sanitary ware products, boasting over 20 years of expertise in the research, development, and production of exquisite artificial stone bathtubs and wash basins. Headquartered in Pinghu City, Zhejiang Province, the company operates two factories, one in Pinghu City, Zhejiang Province, focusing on artificial stone integrated basins and bathroom cabinets, and another in Zhaoqing City, Guangdong Province, specializing in freestanding bathtubs, pedestal basins, and countertop basins. Renowned for our Milo brand, the company has been exporting artificial stone bathtubs and basins since 2008, demonstrating exceptional mechanical strength and compliance with European standards, rendering us highly sought-after across Europe, Australia, America, the Middle East, and Southeast Asia. The exclusive luster of our artificial stone products surpasses ceramics and acrylic/ABS alternatives, offering easy maintenance, diverse shapes, and color options, exuding artistic beauty. With a commitment to top-grade products, excellent service, and continual enhancement, the company has garnered community recognition and client trust, further elevating our global popularity. Notably, our MILUO customized luxury freestanding stone bathtub ST-24(1800) Bathtubs are designed to infuse opulence and sophistication into any bathroom space, and interested individuals are encouraged to seek consultation from our professional team at for personalized bathroom adornment.




Cosentino. "Care and Maintenance for Silestone & ECO by Cosentino." Accessed November 30, 2022.


Black, Jason. "How to Clean Composite Sinks and Baths." The Spruce. Last modified September 8, 2022.


Sims, Layne. "How to Clean Composite Granite Sinks and Bathtubs." Hunker. Accessed November 30, 2022.


Home Depot. "How to Clean a Composite Granite Sink." Accessed November 30, 2022.


Lowe's. "How to Clean a Composite Sink." Accessed November 30, 2022.

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