Can I Undermount a Corian Sink with a Quartz Countertop?

Installing an undermount sink with a quartz countertop is possible, but requires some special considerations. Here is a comprehensive guide on whether and how to undermount a Corian sink with a quartz countertop.

What is Corian?

Corian is a solid surface material made from acrylic resin and alumina trihydrate. It was created by DuPont in 1967 and is sometimes referred to as a “cultured marble.”

Some key features of Corian:

  • Non-porous and highly durable
  • Resistant to stains, impacts, and heat
  • Can be thermally formed into seamless sinks and countertops
  • Available in a wide range of colors and patterns

Corian is a popular choice for kitchen and bathroom countertops and sinks due to its aesthetic appeal and functionality.

What is Quartz?

Quartz is an engineered stone made from roughly 90% ground natural quartz crystals combined with polyester resins and pigments. It is manufactured into slabs to be used for countertops.

Some notable qualities of quartz:

  • Extremely hard and scratch-resistant
  • Non-porous so resists stains
  • Available in a diverse array of colors and patterns
  • Needs to be fabricated and installed by professionals
  • More heat tolerant than solid surfaces like Corian

Quartz has surged in popularity in recent years as a countertop material due to its durability, low maintenance, and stylish look.

Can You Undermount a Corian Sink with a Quartz Countertop?

Yes, it is possible to undermount a Corian sink when paired with a quartz countertop. There are a few important considerations to keep in mind:

Select the Right Adhesives

Proper adhesion is critical to create a lasting bond and tight seal between the Corian sink and quartz countertop.

Use a high-quality 100% silicone adhesive specifically designed for bonding solid surfaces and stone materials. Such adhesives provide the right flexibility and strength.

Avoid household adhesives like Liquid Nails which are not suitable and may fail over time.

Allow Proper Curing Time

The adhesive will need ample time to fully cure, set, and develop maximum strength. This can take 24 hours or longer.

Be sure to follow the adhesive manufacturer’s instructions for cure times before exposing the undermount sink joint to water or heavy use. Rushing this step can lead to leaks or bond failure.

Employ Professional Installation

While it’s possible for an experienced DIYer to undermount a Corian sink themselves, professional installation by a certified fabricator is highly recommended.

Pros have the expertise, right tools, and techniques to minimize errors and ensure a seamless undermount sink installation that will pass inspection.

Get the Countertop Manufacturer’s Approval

Consult with the quartz countertop manufacturer prior to undermounting a Corian sink.

Most quartz makers approve Corian undermount sinks, but it’s wise to verify before permanently adhering the sink. They can also provide specific guidance on installation.

Allow for Expansion and Contraction

Both Corian and quartz undergo minor dimensional changes with fluctuations in temperature.

When undermounting, leave a slight gap between the sink and countertop (1/16”-1/8”) to allow expansion and prevent cracking from thermal stresses. Use silicone caulk to fill the gap.

Pros and Cons of Undermounting a Corian Sink with Quartz


  • Smooth, seamless look and feel
  • Easier cleaning without lip or edges
  • Undermount is a more modern, upscale look
  • Preserves the beauty of the quartz material


  • More difficult and expensive installation
  • Undermount sinks may be prone to leaks if not properly adhered
  • Quartz is very hard so drops and impacts may chip Corian sink
  • Replacing or removing undermount sink requires countertop removal

FAQs About Undermounting a Corian Sink with Quartz

Is undermounting a Corian sink with quartz safe?

Yes, with proper preparation and installation, undermounting a Corian sink to a quartz countertop is perfectly safe and meets building codes. Use the right adhesive and allow for full curing time.

How long does the adhesive take to cure?

Cure times vary based on the specific adhesive used, but usually 24-48 hours is needed for maximum bond strength. Avoid putting weight or stress on the joint before it fully cures.

Do I need to reinforce undermount Corian sinks in quartz?

Some pros recommend reinforcing undermount Corian sinks with blocks or brackets for added strength and support. However, reinforcement is not always required if properly adhered with silicone adhesive.

Can undermounting fail over time?

It’s rare, but undermount joints can fail if the wrong adhesive is used, the sink/countertop are not properly prepped, or if exposed to excessive impact or movement. Allowing for expansion and using quality adhesive minimizes risks.

How do you remove an undermounted Corian sink from quartz?

Removing an undermounted sink from quartz is challenging. The countertop usually needs to be partially removed to access the adhesive bond line. Hire a pro to avoid damaging the countertop.

Does undermounting add resale value?

Undermounted sinks are generally viewed as more upscale and modern. This style can modestly boost resale value compared to top mounted sink installations.


Undermounting a Corian sink with a quartz countertop creates a beautiful, seamless look for kitchens and baths. With proper planning, use of the right adhesive, professional installation, and accounting for material expansion, this combination can be safe, functional, and durable. Consider the pros and cons, and consult manufacturer recommendations before permanently adhering an undermounted sink. With care and patience, you can successfully achieve the high-end look of an undermounted Corian sink paired beautifully with your quartz countertop.