Do Quartz Countertops Require Adhesive to Fasten?

Quartz countertops have become increasingly popular in recent years as a durable, stylish, and low-maintenance option for kitchen and bathroom remodeling projects. Unlike natural stone countertops like granite or marble, quartz is an engineered stone made from crushed quartz particles combined with resin and other materials. This gives quartz the sparkling look of natural stone with added benefits like consistent coloration, resistance to stains, and flexibility in design.

When it comes to installation, many homeowners wonder – do quartz countertops require adhesive to be securely fastened in place? The short answer is yes, quartz countertops do need an adhesive to bond them to the substrate beneath. However, the specific type of adhesive and installation method can vary depending on the quartz manufacturer and fabrication shop.

Proper adhesion is critical to prevent your countertops from shifting, warping, or detaching over time. In this comprehensive guide, we’ll explain everything you need to know about gluing down quartz countertops during installation for a flawless finished product.

Overview of Adhesive Options for Quartz Countertops

The adhesive used for quartz countertop installation typically falls into one of two main categories:

Epoxy Adhesive

Epoxy is a two-part adhesive made from resin and a hardening agent. When combined, these ingredients chemically react to form an extremely strong, rigid bond as the epoxy cures. Epoxy adhesives provide a permanent, waterproof connection.

Silicone Adhesive

Silicone is a flexible, rubbery adhesive made from polymers and silicone oil. As it cures, silicone adheres very well to non-porous surfaces like quartz. Silicone offers strength combined with a little give, allowing for slight expansion and contraction.

Both epoxy and silicone present good options for quartz countertop installation. The choice often depends on the specific brand or fabrication shop preferences. Some quartz companies may even recommend using a combination of epoxy and silicone together.

Do All Quartz Countertops Require Adhesive?

For a secure hold, every quartz countertop needs some sort of adhesive applied during installation. Without it, the weight of the slab could cause it to crack, sag, or completely fall away from the base cabinets over time.

However, certain quartz products are designed with special features on the underside to assist with adhesion:

Interlocking Slabs

Some quartz slabs have interlocking joints similar to a jigsaw puzzle on their underside. When lowered into place, these tabs slot together to create a tighter bond along the seams before adhesive is added.

Mechanical Fasteners

Occasionally, a quartz manufacturer will include pre-drilled holes or channels on the underside of slabs. These allow installers to add screws, bolts, or other mechanical fasteners through the countertop and into the cabinet frame or substrate for extra stability.

While interlocking joints and mechanical fasteners provide supplemental support, adhesive is still required during installation of every quartz countertop. It seals the deal by completely bonding the slab to the base.

Quartz Adhesive Application Process

Applying the right amount of adhesive in the correct pattern is imperative for proper quartz countertop installation. This process will vary slightly based on which type of adhesive is used.

Cleaning and Prepping the Surface

The first step is to thoroughly clean and prepare the countertop substrate. Remove any grease, wax, or debris so the adhesive bonds tightly.

Mixing Two-Part Epoxy

For epoxy, carefully measure and mix the resin and hardening agent according to package directions. Improper ratios can ruin the strength of the bond.

Spreading the Adhesive

Using a notched trowel, spread the adhesive evenly across the surface of the substrate and the underside of the quartz slab.

  • Epoxy adhesive should be applied in a zig-zag pattern to maximize coverage.
  • With silicone adhesive, dotting small blobs in a grid layout works better.

Setting the Slab

Carefully lower the countertop slab into place, pressing down firmly to flatten and even out the adhesive. Some shifting or sliding may be needed to align it perfectly.


Long clamps are placed around the perimeter to hold the countertop tightly against the base as the adhesive begins to cure.

Proper adhesive selection, mixing, and application are all critical steps for creating a lasting quartz countertop installation.

Adhesive Curing Time for Quartz Countertops

One of the downsides of gluing down quartz countertops is that you must wait for the adhesive to fully cure before use. This curing time can take up to several days, depending on temperature, humidity, and the specific product used.

Here are general timeframes to expect:

  • Epoxy adhesive – Cures within 24-72 hours. Cooler temperatures extend curing time.
  • Silicone adhesive – Becomes firm in 24 hours, fully cures in 3-7 days.
  • Two-part epoxy/silicone combo – Up to 72 hours for epoxy, 7 days for silicone.

Avoid placing any heavy objects, appliances, or sinks on your new quartz countertops until the adhesive has completely hardened. There’s a risk of shifting or cracking if pressure is applied too soon.

Patience is required at this stage, but it prevents future problems. Quartz requires solid adhesion to deliver lasting durability.

Benefits of Using Adhesive for Quartz Countertops

While curing adhesive means a brief inconvenience, it offers immense benefits for your quartz countertops’ performance long-term. Here are some of the top advantages:

Rock-Solid Hold

Fully bonded with adhesive, quartz countertops are held firmly in place and cannot slide or detach from the substrate. You’ll never have to worry about loose corners or gaps.

Reduced Damage Risk

With adhesive stabilizing the slabs and sealing seams, quartz resists cracking, chipping, or breaking if impacts occur. Adhesion makes the countertops more shock and damage resistant.

Noise Reduction

Gluing quartz slabs creates a continuous bond that dampens vibrations. This diminishes the rattling or clacking noises that can happen with loose countertops.

Moisture Protection

Adhesives create waterproof seals between the quartz and substrate. This prevents moisture penetration that could cause swelling or warping.

Enhanced Appearance

Tight adhesive bonds keep sections aligned and seams closed. This delivers a smoother finished look compared to loose countertops that can sag or separate.

Overall, the minor hassle of adhesive curing is well worth it for quartz countertops that function flawlessly for decades to come.

Choosing the Best Installer for Quartz Countertops with Adhesive

Installing quartz countertops is a challenging process requiring specialized tools, experience, and techniques to get adhesive application perfect. Choosing the right installation professional is key.

Here are the top tips for picking an installer for your glued-down quartz countertops:

  • Find installers approved by your quartz manufacturer – Many quartz brands certify or recommend specific shops that properly follow their methods.
  • Select an experienced quartz fabricator and installer – Ask about years in business,quartz projects completed, and training credentials.
  • Seek referrals from past clients – Online reviews and word-of-mouth referrals offer transparency about real customer experiences.
  • Confirm they use the quartz company’s recommended adhesives – Whether epoxy, silicone, or both, the product(s) should align with manufacturer specifications.
  • Request photos/videos of finished past quartz projects – Evaluating their execution skills can preview what to expect.

With a reputable and skilled installer adhering to the quartz maker’s guidelines, you can have total peace of mind in the adhesive application and lasting results.

DIY Quartz Countertop Adhesive Application

Full-scale quartz countertop installation is not a DIY-friendly project. The slabs are bulky, fragile, and challenging to maneuver into place flush against the substrate. The adhesive application also requires special equipment and techniques.

That said, for small quartz pieces like backsplashes, experienced DIYers can attempt adhesive installation with proper precautions:

  • Use a high-quality epoxy or silicone adhesive approved for quartz installation.
  • Carefully follow all label instructions for prep, mixing, spreading, and curing times.
  • Have helpers on hand to lift and align the quartz pieces into position.
  • Apply even clamping pressure and allow several days for full adhesive cure before use.
  • Be prepared to call a professional if any issues arise or for additional countertop areas.

For critical kitchen or bathroom quartz countertop projects, it’s wise to hire a qualified installation company and avoid DIY risks. But backsplashes or accent sections can offer amateur installers a manageable starting point.

FAQs About Adhesive and Quartz Countertops

Here are answers to some of the most frequently asked questions homeowners have about adhesive use when installing quartz countertops:

Does every quartz countertop brand require adhesive?

Yes, all quartz countertops from any manufacturer require adhesive to properly secure them to the cabinet substrate during installation. The specific type of adhesive may vary.

What’s the difference between epoxy and silicone adhesive for quartz?

Epoxy creates a rigid, permanent bond while silicone allows for more flexibility. Both work well to adhere quartz. Combining them takes advantage of each adhesive’s strengths.

Is applying adhesive for quartz countertops difficult?

Spreading the adhesive evenly requires some skill, as does properly aligning and clamping down the quartz slabs. Hiring professional installers experienced with quartz adhesive application is recommended.

How soon can I set items on the quartz after installation?

It’s crucial to avoid placing anything on the countertops until the adhesive fully cures, which may take 24 hours to 7 days depending on the product. Full curing is required to prevent any shifting or damage.

Will the adhesive eventually yellow or discolor my quartz?

Quality quartz adhesives are formulated to remain transparent. As long as the manufacturer’s recommendations are followed, the adhesive should not cause discoloration of your countertops.

Can you install quartz countertops without using adhesive?

It is not advised. Adhesive is vital for bonding quartz slabs securely and preventing long-term problems. Focus on hiring professionals who know the proper adhesive products and application techniques.


When installed by an experienced fabricator, quartz countertops create a gorgeous, functional focal point using premium adhesives. While epoxy and silicone options both work, following the quartz manufacturer’s guidance on adhesive products, mixing, spreading, and curing is essential.

With proper adhesion application, your quartz countertops will maintain their beauty and durability for many years before needing replacement. Just be sure to use patience during the curing period. Once fully set, the adhesive provides immense lasting benefits by keeping quartz countertops firmly anchored in place.