A resin shower tray is a tray made of polyester or polyurethane resin, combined with mineral fillers such as marble powder or dolomite. It is coated with a surface layer of gel coat. It stands out for its warm feel, integrated non-slip finish, extra-flat profile, and the possibility of being cut to size on-site.
The resin shower tray has become the most common option in bathroom renovations in recent years, and not by chance: it combines a very modern, extra-flat design with a surface that feels warm and safe underfoot. In this guide, we review, with data taken from the real product sheets in the Merkimarket shower tray catalog, what exactly a resin tray is, its advantages and disadvantages, how to maintain it, and how it compares to acrylic and porcelain so that you can choose with confidence.
Key facts about resin shower trays
- Composition: polyester or polyurethane resin with mineral filler (marble powder or dolomite) and a gel coat surface layer.
- Profile: extra-flat, usually between 2.5 and 4 cm high, ideal for floor-level showers.
- Surface: integrated non-slip (classes C2/C3 depending on the model) and a warm touch, without the cold feeling of ceramic.
- Customization: many models can be cut on-site to fit the exact space.
- Finishes: slate or stone-like textures and colors beyond white (gray, black, sand).
- Alternative materials in catalog: there are also acrylic, porcelain, and Fine Fire Clay trays, each with its own advantages.
- Warranty: minimum legal requirement of three years for consumers in Spain, plus the seller's commercial warranty.
With this summary, you have the essentials; we will now develop each point so that you can make an informed decision.
What is a resin shower tray and what is it made of?
When we talk about "resin trays," we are almost always referring to mineral filler trays: a mixture of resin (polyester or polyurethane) with marble powder or dolomite that is molded into a single piece and finished with a layer of gel coat. This surface layer provides the color, the non-slip texture, and resistance to stains. The result is a compact tray with no open pores and a feel that is noticeably warmer than glazed ceramic.
It is worth knowing that the "resin" label is used broadly in the industry. Under this umbrella, classic mineral filler trays coexist with solid surface materials—such as Roca's STONEX, a high-performance mineral filler—which offer a very uniform matte finish and are repairable in case of scratches. A good example available in the catalog is the 140x90 cm Roca Pyros STONEX tray, extra-flat and non-slip, with drain and siphon included.
Advantages of resin shower trays
The reasons why resin dominates current renovations are quite specific:
- Safety. The non-slip surface is integrated at the factory, not a treatment that wears off over time. Many models reach class C2 or C3, the most demanding for domestic use.
- Extra-flat design. Its low profile allows for installing the shower almost at floor level, a modern finish that also facilitates access for the elderly or those with reduced mobility.
- Warm touch. Since it is not ceramic, it does not transmit that cold feeling when stepping on it, a detail that is appreciated every morning.
- Customizable. Most models can be trimmed on-site to fit into irregular spaces, something impossible with porcelain.
- Aesthetics. Slate or stone textures and a color palette (white, gray, black, sand) that integrates the tray into the bathroom design rather than hiding it.
Disadvantages and limitations you should know
No material is perfect, and being honest about the cons avoids surprises:
- Sensitivity to sharp impacts. The gel coat layer can suffer scratches if you drag abrasive objects or drop sharp metal pieces. In solid surface materials, this damage is usually repairable; in standard mineral filler, not always.
- Texture cleaning. Very rough, slate-like finishes retain more soap and limescale residue, so they require slightly more constant cleaning than a smooth surface.
- Weight and handling. Large formats are heavy and rigid: it is advisable to handle them with care during transport and installation to avoid cracking the corners.
- High-end price. A quality solid surface is more expensive than a basic acrylic tray, although the difference is offset by durability and finish.
Resin vs. acrylic, porcelain, and fire clay
Resin is not the only option on the market. This table summarizes how it compares to the other materials you will find in the catalog, so you can see when each one pays off:
| Material | Touch | Non-slip | Customizable | Ideal for |
|---|---|---|---|---|
| Resin / mineral filler | Warm | Integrated (C2/C3) | Yes, trimmable | Designer renovations and floor-level showers |
| Acrylic | Warm, lightweight | Depends on model | No | Tight budgets and quick assemblies |
| Porcelain | Cold | Non-slip enamel | No | Maximum resistance to scratches and stains |
| Fine Fire Clay | Cold | Non-slip enamel | No | Classic durability at a good price |
In practice, if you are looking for the trendy extra-flat finish and the possibility of adjusting the tray to the space, resin is the natural choice. If your priority is an affordable price with simple installation, an extra-flat acrylic tray more than fulfills that role. And if you value scratch resistance above all else, porcelain and fire clay remain very competitive.
How to maintain and clean a resin tray step by step
Maintenance is simple if you follow a basic routine. These are the steps that extend the life of the surface:
- Routine cleaning. Use warm water, a neutral or mild pH soap, and a non-abrasive cloth or sponge. This is enough for daily use.
- Rinse and dry. Remove soap residue with water and use a cloth or rubber squeegee. Preventing water from drying on its own is the best way to prevent limescale.
- Embedded limescale. For limescale stains, apply a solution of water and white vinegar or a mild limescale remover, let it sit for a few minutes, and rinse. Do not let the product dry on the gel coat.
- Never use abrasives. Avoid metal scouring pads, aggressive cleaning powders, concentrated bleach, or solvents: they damage the surface layer and reduce shine.
- Care for the drain. Regularly clean the grate and the siphon to maintain flow and avoid bad odors; in most trays, the valve can be removed without tools.
How to choose your resin shower tray without mistakes
Beyond the material, there are three decisions that ensure success. The first is size: measure the actual space with a tape measure and remember that resin can be cut, so you can start from a standard size and adjust it. The second is the type of installation: on the floor or recessed at floor level; recessed looks cleaner but requires lowering the subfloor. The third is the texture and color: a slate texture adds character but requires more cleaning, while a smoother surface is easier to maintain. Also, take into account the drain—linear or central—and check if the model includes a valve and siphon, as is the case with several trays in the catalog.
If you are replacing a bathtub, you will be interested in our guide on changing a bathtub for a shower tray, where we detail price and timelines. And to understand all materials and drains in depth, complement this reading with the guide to choosing a shower tray by material, size, and drain. If you are also renovating the enclosure, check how to choose the matching shower screens.
Frequently asked questions about resin shower trays
Does a resin shower tray scratch easily?
Not under normal use. The gel coat layer holds up well to day-to-day life, but it is best to avoid dragging abrasive or metal objects. In solid surface models, a surface scratch can usually be repaired.
Can a resin tray be cut to size?
Yes. One of its great advantages is that many models can be trimmed on-site to fit the exact space, something that porcelain and ceramic do not allow. It is advisable for an installer to do it to maintain the position of the drain.
Which is better, a resin tray or an acrylic one?
It depends on your priority. Resin offers more design, integrated non-slip texture, and custom options; acrylic is lighter and cheaper. For a designer renovation, choose resin; for a tight budget, choose acrylic.
How do you remove limescale from a resin tray?
With water and white vinegar or a mild limescale remover, letting it act for a few minutes and then rinsing. Never use metal scouring pads or abrasive products, because they damage the gel coat surface.
Ready to choose? Explore all models in the Merkimarket shower tray collection, with shipping throughout Spain.
Article written by the Merkimarket editorial team. Material and finish data are taken from the product sheets in the Merkimarket shower tray catalog. Measurements, prices, and availability may vary; check each sheet for current information in Spain.
