Can I get both White Onyx and Tiberius in a matte or gloss finish?

Yes. Every color engineered by Syn-Mar Products—including White Onyx and Tiberius—is available in either our factory-sanded matte finish or our high-luster polished gloss finish, allowing you to fine-tune the texture and reflectivity of your bathroom redesign.

Why do White Onyx shower panels require a primed white wall underneath?

Because White Onyx retains a natural, semi-translucent optical depth, the colors and shadows directly behind the wall can sometimes show through the lighter swirls of the material. Moisture-resistant backer board typically has a blue or green hue, which can inadvertently distort the crisp white finish of your new shower. Applying a solid white primer to the wall board ensures a uniform, bright background and prevents underlying sheetrock joints, dark screwheads, or colored wallboard from affecting the final look.

Will my Tiberius shower enclosure look identical to a showroom color block sample?

While the base color tone and veining pigments remain consistent across every batch, Tiberius is gravity-cast by hand. This organic manufacturing process means the exact movement, flow, and stretch of the veins will be completely unique to your specific panels and vanity top.

Are custom accessories like shower niches and corner seats available in matching colors?

Absolutely. Syn-Mar manufactures custom built-in shampoo niches, corner shelving, soap dishes, and full-bench seats in the exact same material and color batch as your shower walls, ensuring a seamless, leak-free, and color-matched installation.

How do I clean and care for a Syn-Mar solid-surface shower system?

Because our engineered stone surfaces are non-porous and completely grout-free, maintenance requires nothing more than a simple squeegee and occasional wiping with warm, soapy water or standard, non-abrasive bathroom cleaners. Never use harsh abrasive scouring pads, as they can dull the factory finish over time.

Can my custom shower base be the same color as my shower walls?

Yes, absolutely! Every custom shower base we manufacture is available in any of our colors. Whether you want the timeless, bright finish of White Onyx or the bold, dramatic movement of Tiberius, we can manufacture your shower base to perfectly match your grout-free shower walls, creating a stunning, seamless aesthetic for your bathroom.

White Onyx vs. Tiberius: Choosing Your Shower Color

When planning a high-end bathroom remodel, eliminating high-maintenance grout lines shouldn't mean compromising on visual impact. One of the biggest design decisions showroom designers, contractors, and homeowners face is choosing the foundational color palette for their new shower enclosure or vanity top. Should you design your bathroom around a bright, timeless neutral that expands the room, or anchor the space with a dramatic, statement-making stone pattern?

At Syn-Mar Products, our engineered stone surfaces have been hand-crafted right here in Ellington, Connecticut since 1977. Because every shower wall, custom shower base, and seamless vanity top is custom-manufactured rather than pulled off a big-box retail shelf, our colors offer depth, durability, and rich visual movement.

To help you choose the ideal look for your upcoming project, let’s put two of our beautiful finishes head-to-head: our #1 best-selling classic, White Onyx, and our bold Tier 3 showstopper, Tiberius.

There is a reason White Onyx remains our most popular color specification across residential remodels throughout New England, New York, New Jersey, and Pennsylvania. Featuring a crisp, bright white background paired with subtle, flowing white swirls, White Onyx delivers the clean, spa-like luxury of natural white marble without the porosity, staining risks, or grout scrubbing.

Why Designers & Homeowners Love White Onyx

Maximum Light Reflection: The bright white surface naturally reflects bathroom lighting, instantly making compact guest baths and primary suites feel larger and more open.

Unmatched Design Versatility: White Onyx acts as a sophisticated neutral canvas that pairs effortlessly with cool matte black fixtures, traditional brushed nickel, or warm brass hardware.

Seamless Visual Flow: Pairing White Onyx grout-free shower walls with a matching custom shower base creates a monolithic, ultra-clean aesthetic.

Because White Onyx is formulated with premium, semi-translucent resins to give the stone deep optical richness, light can naturally pass through the material.

Pro Installation Rule: When preparing for installation, always apply a solid white primer to the moisture-resistant drywall or cement backer board before mounting White Onyx shower walls. Because water-resistant sheetrock typically has a blue or green hue, applying a white primer prevents the colored wallboard from distorting the final look of the stone and giving it an unwanted tinge. It also ensures that underlying pencil layout lines, sheetrock joints, and dark screwheads won't show through your beautiful new grout-free shower system.

If White Onyx is the versatile classic, Tiberius is the architectural showstopper. As one of our premier Tier 3 engineered colors, Tiberius features deep, high-contrast linear veining with a distinct, sophisticated green tone that commands attention immediately upon entering the bathroom.

The Power of Gravity Casting

While mass-market acrylic surrounds print shallow patterns onto the surface of thin plastic sheets, Syn-Mar manufactures Tiberius using an authentic gravity-casting process. By blending custom mineral pigments with proprietary, high-density resin and pouring them by hand into our casting molds, gravity naturally pulls and stretches the stone veining across the entire length of the panel or sink.

Why Designers & Homeowners Choose Tiberius

One-of-a-Kind Artistry: Because the veining is organically driven by gravity during hand-casting, no two Tiberius panels or vanity tops are ever identical. Every single product is unique.

High-Contrast Luxury: Tiberius anchors modern industrial, moody contemporary, or executive primary bathroom layouts, pairing exceptionally well with dark wood vanities and bold architectural lighting.

The "Waterfall" Sink Effect: When manufactured as a seamless vanity top with an integrated, same-color sink basin, the dynamic veining of Tiberius cascades down the flat countertop and stretches right into the bowl, creating a stunning waterfall effect.

Feature	White Onyx (Tier 2)	Tiberius (Tier 3)
Visual Aesthetic	Bright, airy white background with delicate white swirl	Rich, high-contrast linear veining with a stunning green tone and dramatic movement
Surface Translucency	Semi-translucent (Requires white primer on wall substrate)	Opaque, full-depth color saturation
Finish Availability	Factory Sanded Matte or Polished Gloss	Factory Sanded Matte or Polished Gloss
Integrated Sink Appeal	Available as a seamless two-tone design (with a white integrated sink) or a same-color integrated sink	Available as a seamless two-tone design (with a white integrated sink) or a same-color integrated sink
Ideal Design Style	Coastal, farmhouse, transitional, and classic spaces	Modern luxury, contemporary, and high-contrast designs

Whether your style leans toward the timeless elegance of White Onyx or the bold sophistication of Tiberius, every Syn-Mar product is built with the exact same service backbone and uncompromising quality.

Unlike thin and flexible acrylic wall surrounds or boring and limited fiberglass alternatives, Syn-Mar manufactures thick, dense engineered stone systems engineered to stand up to daily life. Because we partner directly with our network of bathroom dealer showrooms, homeowners get custom sizing options with quick lead times. Our reliable Connecticut-made craftsmanship is backed by nearly 50 years of exceptional customer service and our 5-year warranty.

Can I get both White Onyx and Tiberius in a matte or gloss finish?
Yes. Every color engineered by Syn-Mar Products—including White Onyx and Tiberius—is available in either our factory-sanded matte finish or our high-luster polished gloss finish, allowing you to fine-tune the texture and reflectivity of your bathroom redesign.
Why do White Onyx shower panels require a primed white wall underneath?
Because White Onyx retains a natural, semi-translucent optical depth, the colors and shadows directly behind the wall can sometimes show through the lighter swirls of the material. Moisture-resistant backer board typically has a blue or green hue, which can inadvertently distort the crisp white finish of your new shower. Applying a solid white primer to the wall board ensures a uniform, bright background and prevents underlying sheetrock joints, dark screwheads, or colored wallboard from affecting the final look.
Will my Tiberius shower enclosure look identical to a showroom color block sample?
While the base color tone and veining pigments remain consistent across every batch, Tiberius is gravity-cast by hand. This organic manufacturing process means the exact movement, flow, and stretch of the veins will be completely unique to your specific panels and vanity top.
Are custom accessories like shower niches and corner seats available in matching colors?
Absolutely. Syn-Mar manufactures custom built-in shampoo niches, corner shelving, soap dishes, and full-bench seats in the exact same material and color batch as your shower walls, ensuring a seamless, leak-free, and color-matched installation.
How do I clean and care for a Syn-Mar solid-surface shower system?
Because our engineered stone surfaces are non-porous and completely grout-free, maintenance requires nothing more than a simple squeegee and occasional wiping with warm, soapy water or standard, non-abrasive bathroom cleaners. Never use harsh abrasive scouring pads, as they can dull the factory finish over time.
Can my custom shower base be the same color as my shower walls?
Yes, absolutely! Every custom shower base we manufacture is available in any of our colors. Whether you want the timeless, bright finish of White Onyx or the bold, dramatic movement of Tiberius, we can manufacture your shower base to perfectly match your grout-free shower walls, creating a stunning, seamless aesthetic for your bathroom.

Syn-Mar Products is a third-generation, family-owned manufacturer of grout-free shower systems, custom shower bases, and seamless vanity tops. Since 1977, we've manufactured engineered stone products in Connecticut and proudly supplied dealer partners throughout the Northeast.

We operate strictly as a direct manufacturer, not a remodeler or installer. For our B2B plumbing wholesalers and showroom partners, this means we sell direct to you—unlike competitors who rely on middle-man distribution companies. We stand behind our high-quality craftsmanship with a 5-year warranty.