Granite composite sinks are made by mixing fine granite sand with an acrylic resin bonding agent. Most manufacturers use a mix of 80% granite particles and 20% bonding agent.
This process produces a material that has many of the same qualities of granite but is more durable, easier to maintain, and less expensive.
Unlike natural granite, composite sinks have a very uniform color but still retain much of the charm of natural granite.
As you can see in the examples below, granite composite sinks have a beautiful “sandy” look that works well with many decors. Most composite sinks will have a lightly textured matte finish.
Manufacturers have much greater control over the color and consistency of granite composite sinks, so they can offer a wide range of options. For example, Blanco’s Silgranit sinks are currently offered in a eight unique color choices:
You can play around more with Blanco’s composite sink colors using their exclusive design tool.
Granite Composite Durability
Granite composite sinks are incredibly tough and offer excellent resistance to scratching, scuffing, and impacts. The uniformity of the material also means it won’t chip like real stone.
Granite composite has excellent heat resistance. Most manufacturers rate their granite composite sinks to just over 530 °F (about 276 °C).
Small chips and cracks may occur from heavy impacts, but they can be repaired with an epoxy filler tinted to match the sink.
Maintenance and Cleaning
Unlike solid granite, granite composite is nonporous, making it easier to clean and maintain.
Most stains and messes should can be cleaned using gentle cleaners and soft scouring pads or microfiber cloths. Don’t use steel wool and wire brushes.
Wiping the sink dry after every use will help avoid stains or mineral buildup.
Many granite composite sinks will also benefit from an occasional application of mineral oil. This is especially helpful with darker color sinks when it comes to maintaining deep blacks and browns.
Cost of Granite Composite
Most granite composite sinks will range in price from $200 to $400. This is relatively affordable compared to other premium sinks options like cast iron or fireclay.
Of course, cost can vary greatly depending on size, mounting style, and basin configuration. Undermount and apron front (farmhouse) sinks will tend to be more expensive.
The thickness and density of most granite composite sinks mean they have natural sound-absorbing properties and are very quiet.
Since they are not made of a singular material, composite sinks have the look of luxury materials without the full cost that would accompany a fixture constructed entirely from luxe materials.
There’s nothing unusually difficult about installing a granite composite sink, but you should keep in mind that they’re a lot heavier than stainless steel and may require additional structural support below your counter.
If you’re not sure if your counter can handle the additional weight of a composite sink, it’s best to hire an experienced contractor for the job.
- Relatively affordable
- Non-porous and durable
- Low noise
- Heat resistant
- Higher maintenance than stainless steel
- More prone to mineral buildup
Ideas & Inspiration
Below you’ll find a gallery of granite composite kitchen sinks. Clicking any image will take you Amazon, where you’ll find more information about specs and pricing.