When choosing a high-quality surface material for kitchens, bathrooms, hospitals, or commercial spaces, acrylic solid surface materials have become a top choice for architects, designers, and homeowners alike. But not all solid surfaces are created equal. One of the most common questions is:

What is the difference between 100% acrylic solid surface and modified (composite) acrylic solid surface?

As a leading manufacturer of solid surface materials, Kstone specializes in producing both 100% pure acrylic solid surface sheets and composite acrylic surfaces. In this article, we’ll break down the differences, applications, costs, and maintenance of these materials — and help you choose the right one for your project.

What Is 100% Acrylic Solid Surface?

100% acrylic solid surface is made entirely from polymethyl methacrylate (PMMA) and methyl methacrylate (MMA) resin. It is a non-porous, seamless, durable material that offers excellent thermoformability, making it ideal for high-end applications.

Key Features:

• High transparency and bright color

• Seamless joints and smooth finish

• Can be thermoformed (bent) at 180°C without cracking

• Long lifespan with no yellowing, fading, or cracking

• Excellent chemical and stain resistance

• 10-year warranty from Kstone

What Is Modified (Composite) Acrylic Solid Surface?

Modified or composite acrylic solid surface is a blend of acrylic resin with polyester resin and fillers. While it may look similar to 100% acrylic on the surface, its internal structure and performance are quite different.

Key Features:

• Less clarity and smoothness than pure acrylic

• Limited thermoformability (small angle bends only)

• Prone to yellowing and surface cracks over time

• 2-year limited warranty

• More affordable option for low-traffic or budget-conscious projects

Side-by-Side Comparison

Applications of Acrylic Solid Surface Material

Acrylic solid surface materials are widely used in:

• Kitchen countertops and islands

• Bathroom vanities and sinks

• Hospital and laboratory worktops

• Retail and commercial interiors

• Wall cladding and shower panels

• Reception desks and furniture surfaces

Thanks to its hygienic, seamless, and repairable surface, 100% acrylic is particularly popular in healthcare and food service environments.

Cost and Long-Term Maintenance

While 100% acrylic solid surface costs more upfront, it provides significant long-term value:

• Longer lifespan with fewer repairs

• Easy to maintain and clean (soap and water is enough)

• Repairable surface — minor scratches and stains can be sanded away

• Non-porous — won’t harbor bacteria or mold

In contrast, composite acrylic and calcium-filled boards may lead to higher replacement or repair costs over time due to yellowing, cracking, and lower durability.

How to Identify the Real Material

With increasing market competition, some suppliers may use low-grade materials to cut costs. Here’s how you can spot the difference:

1. Look at the surface: Pure acrylic is clear and layered, with a smooth polish.

2. Bend test: Try thermoforming – only 100% acrylic bends without breaking.

3. Cutting test: Pure acrylic cuts like soft snow; calcium boards are hard like stone.

4. Burning: Pure acrylic gives off a stronger smell due to MMA/PMMA.

5. Chemical test: Use hydrochloric acid – calcium boards release CO₂ gas.

Why Choose Kstone?

At Kstone, we are committed to quality. We manufacture:

• ✅ 100% Acrylic Solid Surface Sheets

• ✅ Modified Acrylic Solid Surface Sheets

• ✅ Matching Acrylic Seamless Adhesive Glue

With over a decade of experience, we offer reliable quality, competitive pricing, and professional support. Whether you’re working on a luxury kitchen or a large-scale commercial project, Kstone is your trusted supplier.

Want to get samples or a quote?
📧 Contact us today and discover the Kstone difference.