A Concrete-Tone Undermount Sink Built for the Whole Kitchen Workflow
The Karran QU-720 is a quartz composite undermount kitchen sink in the Concrete colorway, sized to handle a demanding two-station workflow in a single footprint. Its equal double-bowl layout pairs a dedicated wash side with a rinse or prep side, and the 9-inch bowl depth gives you plenty of room for cookware without crowding the cabinet below.
Key Features
• Equal double-bowl layout gives each side of the sink identical working space, so neither station feels like an afterthought.
• 80% quartz / 20% acrylic resin construction makes the bowls highly scratch, stain, chip, and heat resistant for everyday kitchen use.
• Concrete colorway offers a muted, industrial-leaning neutral that pairs naturally with wood, stone, and matte-finish cabinetry.
• Flat mounting rim with no faucet deck keeps the undermount profile clean — the faucet and any accessories mount through the countertop.
• Compatible with quartz, granite, and solid surface countertops for a conventional undermount installation with a small positive or negative reveal.
Where This Sink Earns Its Place
A 33-1/2-inch double equal bowl is a practical choice whenever two people are working the kitchen at the same time — one side holds a soaking pot, the other stays clear for prep rinse or produce washing. For cabinet shops and contractors building out kitchens with solid surface or stone countertops, the QU-720's flat rim undermounts cleanly with a positive or negative reveal, leaving a finished countertop edge as the visible transition. Homeowners who want a sink that handles the full spectrum of cooking nights — sheet pans, Dutch ovens, a colander full of vegetables — benefit from the 9-inch bowl depth, which accommodates tall items without splashing over the rim. The Concrete finish reads as a warm neutral in most lighting, complementing grey, greige, and white cabinetry equally well without the high-contrast commitment of a Black bowl.
Quartz Composite Inside and Out
Karran's quartz composite formula runs the same material all the way through the bowl wall, so there is no thin surface coating to chip away from a base material underneath. The result is a sink that handles dropped pots, abrasive scrubbing pads, and years of thermal cycling — boiling water, ice, hot pans set close to the edge — without visible degradation in the finish. The Concrete color runs through the full material depth, so minor surface scuffs do not expose a different color layer beneath. Because quartz composite is non-porous at the surface, it does not harbor bacteria or absorb coffee, wine, or tomato stains the way a porous stone might. This is indoor kitchen use only — the material and the mounting method are designed for a conditioned interior environment.
Who This Sink Is Designed For
Cabinet shops and countertop fabricators speccing a kitchen package for a client who wants an undermount quartz bowl without a seamless laminate installation will find the QU-720 straightforward to work with: flat rim, standard reveal options, faucet holes in the countertop rather than the sink deck, and a color that photographs well in finished kitchen shots. Designers specifying a kitchen renovation can call out the Concrete colorway as a deliberate material-texture decision — it coordinates with concrete-look tile, raw-wood open shelving, and matte black hardware without competing with any of them. Homeowners who cook daily and want a sink that holds up to real use without demanding special cleaners or careful handling will find the quartz composite construction matches the way they actually work.
Frequently Asked Questions
Does this sink mount seamlessly in laminate countertops?
No. The QU-720 is a standard undermount sink, not a seamless series model. It mounts beneath quartz, granite, and solid surface countertops with a conventional reveal. Karran's seamless laminate capability belongs to the Q Series, which is a separate line.
Where does the faucet mount on this sink?
The QU-720 has no faucet deck, so the faucet, soap dispenser, and any other accessories mount through drillings in the countertop behind or beside the sink.
Are a drain, grid, or template included?
This SKU is a bare sink. A drain assembly, bottom grid, and installation template are sold separately. Verify the drain opening and order the matching basket strainer or flange before installation.
What is the minimum cabinet size this sink requires?
The QU-720's overall width is 33-1/2 inches. Verify your sink base cabinet opening against the actual sink and any required support structure before cutting; minimum cabinet requirements should be confirmed from the Karran specification sheet for this model.
How do I clean and maintain the Concrete quartz finish?
Routine cleaning with mild dish soap and a soft cloth keeps the surface in good condition. Avoid steel wool, highly abrasive pads, and concentrated bleach-based cleaners, which can dull the finish over time. Karran's Luster Pro oil, available separately, is formulated to maintain quartz composite surfaces.
A Sink That Matches the Way Kitchens Actually Work
The QU-720 in Concrete brings together a practical equal-bowl layout, durable quartz composite construction, and a finish that fits comfortably into a wide range of kitchen design directions — without requiring special countertop methods or finish-matching compromises.
