Concrete Basin – Soft Rectangular Countertop Vessel Sink
Rounded rectangular basin with softened edges for countertops.
£740.00
- * Hand-cast in our London workshop, tailored to each batch.
- * 20 custom colours available in our standard collection.
- * Sealed with a professional-grade, stain-resistant penetrating sealer.
The countertop concrete basin is cast as a self-contained vessel — softened rectangular form, slim walls, and a refined rim profile designed to sit on a vanity shelf, concrete worktop, or bespoke surface without additional framing or carcass. Hand-cast in Ultra-High Performance Concrete, the basin achieves a precise wall thickness and tight corner radius that positions it distinctly from heavier aggregate concrete alternatives. The mineral surface reads differently at every light angle, carrying the natural variation and quiet depth that distinguishes hand-cast concrete from ceramic or resin.
Suited to Japandi, Soft Modern, and Organic Modern bathrooms where the basin itself is the material focal point. It pairs equally well with a bespoke concrete vanity shelf, a natural stone worktop, or a simple wall-mounted timber ledge. Available in any of 20 curated pigmented colours. Alternatively, bespoke concrete finishes like; polished terrazzo, hand-packed marble-effect, or a custom colour brief can be specified -Please get in touch to enquire.
Each basin is made to order in our London workshop. Surfaces are hand-finished and sealed with a professional-grade, penetrating sealer that protects against moisture and daily wear while preserving the organic character of the concrete.
Please note: This product includes the concrete basin only. Taps, waste fittings, counter, or plumbing accessories are not included.
Explore our Bespoke Concrete Fabrication Process or view Concrete Colours & Finishes to see the full palette and surface treatments.
Product Specifications
- External Dimensions: 450mm x 350mm x 100mm
- Approximate Weight: ~18 kg
- Waste Outlet: Standard 45mm Ø — compatible with standard UK / European unslotted waste assemblies.
Note: Due to the hand-cast nature of architectural concrete, dimensions may feature marginal organic tolerances of +/- 5mm.
Available in a curated range of natural tones: Elemental Greys, Warm Earth & Sand, and deep Aqua & Forest hues. Each designed to harmonise with contemporary interiors.
Custom pigment matching is available for bespoke architectural projects.
View our full Colour Palette & Samples for a detailed look at our concrete finish options and colour details.
Seeking a bespoke tone or tailored artisanal finish to match a specific interior palette? We frequently collaborate on custom colour matching and studio commissions. Reach out directly via email at hello@gumiworks.com, or use our Customisation options above to submit your project requirements.
Gumi Works offers a spectrum of hand-crafted surface expressions designed to elevate the tactile experience of high-performance concrete. Our standard collection includes 20 curated solid colours to choose from.
Additionally, we also offer the following artisanal finishes for our concrete products;
Terrazzo & Aggregates: Our Solid Polished finishes can be upgraded to a Bespoke Terrazzo, incorporating curated stone aggregates for a mid-century or contemporary play on light and shadow.
Artisanal Veining: For a timeless aesthetic, our Marble-Effect Veining creates a natural, authentic look, mimicking the organic movement of stone while retaining the strength of GFRC.
Hybrid Luxury: Our exclusive Metal-Concrete Blends fuse metallic elements with concrete for a high-end, natural luxury statement pieces.
All finishes are sealed with our Penetrating Reactive Sealer, ensuring a breathable, stain-resistant surface that maintains its integrity in both residential and commercial high-traffic environments.
If you are interested in these artisanal finishes for this piece, contact us directly via email at hello@gumiworks.com, or use our Customisation options above or below to submit your project requirements.
Learn more about our Production Process and how we craft our high-performance GFRC.
Handcrafted using High-Performance GFRC Concrete (Glass Fiber Reinforced Concrete). This advanced composite offers superior flexural strength and durability compared to traditional concrete. We utilise a Low-Carbon, Silicate-Free cementitious matrix, sustainable sand aggregates, and a Penetrating Reactive Sealer system to ensure a luxury finish that ages gracefully while maintaining structural integrity.
Learn more about our Production Process and how we craft our high-performance GFRC.
Typically 3–6 weeks from order confirmation. For bespoke commissions, timelines may vary based on design complexity and studio workload.
Logistics are optimised by destination zone for secure transport:
- UK Mainland: Free Delivery via tracked parcel couriers or secure pallet distribution networks.
- Western Europe: £45 Flat Rate : Austria, Belgium, Denmark, France, Germany, Italy, Luxembourg, Monaco, Netherlands, Portugal, Spain.
- Republic of Ireland: £65 Flat Rate.
- Rest of the World: Available upon custom enquiry. Contact the studio for a bespoke freight quote.
Fulfilment Method: All RTB shipments are strictly handled via Curb-Side Delivery. Items are brought to the nearest accessible kerb or driveway entrance. Couriers are not insured to carry items indoors.
🛑 Critical 24-Hour Inspection Window: You must unwrap and check your concrete surfaces within 24 hours of delivery signature. Any transit discrepancies must be logged via email within this window to remain eligible for freight insurance coverage. Read our full setup guidelines on our Delivery & Logistics page.
Standard retail orders are eligible for a statutory 14-day return or cancellation window from the official date of delivery signature.
To qualify for a complete refund, items must adhere to our return-policy criteria:
- The item must be completely uninstalled, unplumbed, and unaltered. Once a concrete basin has been test-fitted into plumbing rings or sealed to a vanity unit, it is classified as a used item and is entirely ineligible for return.
- Returns must be safely packaged inside their original structural packaging/crating and foam buffers. Items returned without original safety packages may damage in transit.
- The buyer retains full responsibility for organising and funding fully insured return freight with reputable couriers.
Review our complete policy framework, value deductions, and 5-Year Structural Integrity Guarantee details on our dedicated Returns, Cancellations & Guarantees page.
Maintain the premium surface of your luxury concrete basin with simple daily upkeep practices:
- Clean regularly using warm water, a soft microfibre cloth, and a gentle pH-neutral liquid soap.
- Never utilise bleach-based bathroom cleansers, heavy chemical descalers, citrus-based solvents, or abrasive scouring pads, which will chemically degrade the protective topical sealing layer.
- Wipe away heavily pigmented spills or highly acidic compounds (such as hair dyes, nail polish removers, or harsh facial acids) immediately to eliminate surface staining vectors.
For further details, visit our Concrete Care and Maintenance page.
How do I prevent stains from soap, toothpaste, or cosmetics on a concrete basin?
Our basins are protected by a high-performance, stain-resistant penetrating sealer in a refined matte finish. Engineered specifically for architectural wet zones, it creates a hydrophobic barrier against daily bathroom elements. For daily care, simply rinse the bowl after use and wipe away standing water. Avoid leaving heavily pigmented liquids like hair dyes, facial acids, or harsh chemical cosmetics on the surface.
How heavy are the concrete basins, and what installation supports do they require?
A standard Gumi Works concrete basin weighs approximately 15-20 kg. For countertop installations, verify that your vanity unit or floating console is structurally rated to carry this weight profile. For wall-mounted installations, the basin must be anchored securely into timber stud noggins or masonry structures using heavy-duty steel brackets before wall cladding. Standard hollow-wall or plasterboard fixings are not suitable.
What is the difference between a solid concrete basin and microcement or resin alternatives?
Every Gumi Works basin is hand-cast from authentic, solid ultra-high-performance concrete (UHPC). Many “concrete” sinks on the market are actually lightweight plastic resin imitations or cheap wood templates covered in a thin, fragile “concrete effect” microcement coating that easily cracks and delaminates. Our solid-cast construction ensures true architectural integrity, a deeply tactile raw stone feel, and an exceptional structural lifespan.
What type of waste kit and plumbing connections do I need to source?
Our basins are designed with clean, minimalist lines and do not feature an integrated overflow hole. You will need to source a standard 45mm unslotted waste assembly. Standard UK and European plumbing traps connect seamlessly to our integrated drain geometries.
Are the basins supplied with pre-drilled tap holes?
Our standard Ready-to-Buy (RTB) collection models are supplied without tap holes. This leaves them optimized for elegant wall-mounted faucets or deck-mounted taps installed directly onto your vanity countertop surface. If your project layout requires a faucet hole drilled directly into the concrete rim, please contact our studio before ordering to arrange a custom casting profile.
How do I remove limescale without damaging the concrete sealer?
Because authentic concrete is an alkaline stone, harsh chemical descalers, bleach, or citrus-based solvents will chemically degrade the protective sealing layer. To combat hard water and limescale safely, use a diluted solution of mild pH-neutral liquid soap and a soft microfibre cloth. Wiping the bowl dry after use is the most effective way to eliminate mineral scale buildup in hard water zones.
Can a Gumi Works concrete basin be used in an outdoor kitchen or garden terrace?
Yes. Our advanced structural mix design incorporates UV-stable mineral pigments and frost-resistant curing protocols. A Gumi Works basin functions beautifully in luxury indoor bathrooms or can transition seamlessly into an outdoor kitchen, pool house, or architectural alfresco terrace.
What is the typical lead time for a basin order?
All our product orders are Made-to-Order fabrications. Our comprehensive hand-casting, finishing, and multi-stage sealing process takes approximately 3-6 weeks to complete before dispatch.
Can I order a custom size, double vanity layout, or commercial wash trough?
Absolutely. Beyond our standard retail stock, we specialize in bespoke architectural design and casting for premium residential and commercial projects. To ensure total clarity before we pour, we can translate your initial spatial layouts or sketches into detailed 3D CAD renders. This allows you to visualize the exact geometry, scale, and color fusion of your custom washbasin within your space before production begins at our studio.</p.
Interested in further customising sizes, colours, or finishes of this piece?
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