Can You Use Undermount Sink With Quartz Countertop?

Installing an undermount sink with a quartz countertop can be a beautiful addition to your kitchen or bathroom. However, proper installation techniques are required to ensure a watertight seal between the sink and countertop. Here is a detailed guide on using undermount sinks with quartz countertops.


Quartz countertops are popular options for modern kitchens and bathrooms due to their durability, low maintenance, and stylish appearance. Quartz is an engineered stone made from crushed quartz particles combined with resin and pigments. It creates a smooth, non-porous surface that resists scratches, stains, and heat.

Undermount sinks provide a seamless transition between the countertop and sink basin. The sink is installed underneath the counter, creating a minimalist, contemporary look. The countertop material wraps into the sink, getting rid of any rim or lip. This makes cleaning easier by eliminating hard-to-reach edges where grime can accumulate.

Benefits of Using an Undermount Sink with Quartz

  • Achieve a sleek, modern aesthetic. An undermount installation highlights the countertop material and creates a smooth visual flow in the kitchen or bath.
  • Enjoy easy cleaning. With no seams or edges between the sink and countertop, it’s simple to wipe away messes. Food and water spill right into the basin.
  • Gain more usable countertop space. Without a sink lip, you can make full use of the surrounding countertop. This allows more room for meal prep and staging.
  • Experience quieter performance. With no contact between the sink and countertop, undermount sinks cut down on noise from running water and garbage disposal vibrations.

Considerations for Installation

Installing an undermount sink requires careful planning and precision to get a perfect fit with the quartz countertop. Here are some key factors to consider:

Select the Right Sink

Look for an undermount sink specifically designed for solid surface countertops like quartz. Stainless steel and cast iron sinks are durable options that resist high heat. Check that the sink dimensions align with the countertop cutout size.

Choose a Suitable Adhesive

Use a flexible silicone adhesive made for bonding sinks to quartz and other solid surfaces. The adhesive will accommodate the slight expansion and contraction in quartz. Avoid rigid epoxy adhesives.

Allow Room for Clips

Undermount sink clips bolt through the countertop to grip the sink rim. Make sure to account for the extra space needed for sink clips in the cutout dimensions.

Cut Precisely

A tight fit is crucial for an invisible joint between the sink and countertop. Use the sink itself as a template when cutting the quartz. This avoids gaps due to inaccurate measurements.

Clean Surfaces Thoroughly

Remove any debris, dust, oil, or residue before applying adhesive to the sink and countertop edges. Proper bonding depends on completely clean surfaces.

Apply Adhesive Carefully

Run a continuous bead of silicone adhesive around the top rim of the sink. Use a caulking gun for the best control. Avoid gaps or uneven application.

Step-by-Step Installation Guide

Follow these key steps for a smooth undermount sink installation with a quartz countertop:

1. Make the Countertop Cutout

Use the exact dimensions of the sink to trace and cut the opening in the quartz. Cut with a specialized quartz-cutting saw. Polish edges smooth.

2. Set and Mount the Sink

Place the sink into the opening to check the fit. Remove and apply adhesive to the rim. Re-set the sink, pressing firmly into the adhesive.

3. Attach the Clips

Drill pilot holes and fasten the sink clips evenly around the basin. Tighten just until snug – overtightening can crack the quartz.

4. Allow the Adhesive to Cure

Leave the adhesive undisturbed while it sets and cures fully, usually 24-48 hours. Avoid use of the sink during this time.

5. Seal the Joints

Apply a thin bead of silicone caulk around the entire joint between the sink and countertop. Wipe away any excess for a neat finish.

6. Make Connections

Connect the sink drain assembly and supply lines according to manufacturer instructions. Check for leaks at all connections.


Can any undermount sink be used with quartz?

No, you’ll need a model designed for solid surface materials. Stainless steel and cast iron sinks are common options. Avoid enameled cast iron sinks.

How do you cut the quartz for an undermount sink?

Use a specialized saw with a diamond-coated blade. Make a template from the sink itself to trace precise cut lines. Cut just inside the lines.

What kind of adhesive should be used?

A flexible silicone adhesive bonds best and allows slight movement in the quartz. Avoid hard epoxy adhesives. Only use adhesives recommended for quartz.

How long does the adhesive need to cure?

Most silicone adhesives take 24-48 hours to fully cure and bond to the quartz. Avoid stressing the joint during the curing time.

Can an undermount sink damage quartz?

With proper installation, an undermount sink will not damage quartz. Cracks can occur if the sink is not adequately supported or clips are overtightened.


Installing an undermount sink paired with a quartz countertop makes an elegant, seamless addition to contemporary kitchens and baths. With careful attention to sink selection, precise cutting, adequate support, and the use of the right flexible adhesive, undermount sinks can be installed securely without damaging the durable quartz material. Following the proper techniques will result in a strong, watertight fit that enhances the smooth visual flow of the space.