What to Glue Quartz Countertop Seam

Installing quartz countertops can transform the look of your kitchen or bathroom. With their elegant appearance and durability, quartz countertops are a fantastic choice for home renovation projects. However, proper installation is crucial to ensure your countertops last. Understanding what to use to glue the seams is an important part of the installation process.

Why Do You Need to Glue the Seams?

Quartz countertops are made of engineered stone composed of ground quartz, resins, and pigments. The countertop slabs are cut to size for your project and will likely require multiple pieces. These adjoining pieces need to be seamlessly joined. Gluing the seams is necessary for:

  • Achieving a smooth, continuous appearance. The glue helps bond the slabs together to look like one uniform surface.
  • Preventing moisture and bacteria buildup. Any gaps along the seams can allow moisture penetration, leading to damage and unhealthy buildup. The adhesive creates a watertight seal.
  • Strengthening the countertop. The glue adds stability along the seams, helping prevent cracks or separation over time.
  • Minimizing noise. An unglued seam can cause noise when objects are slid or dragged across it. The adhesive helps reduce noise.

Properly gluing the quartz seams ensures your countertops are structurally sound, sanitary, and aesthetically pleasing.

Choosing the Right Adhesive

The key to a successful quartz countertop installation is using the correct adhesive specially formulated for quartz. The product characteristics to look for include:

Designed for Solid Surfaces

The adhesive must be intended for solid surface materials like natural stone, quartz, granite, and others. The product specifications should state it is suitable for these materials. Adhesives meant for other surfaces may not bond properly.

Non-Porous Performance

Quartz is non-porous, so the adhesive must be designed to bond non-porous materials. Make sure the adhesive label indicates it will work on non-porous, waterproof surfaces.


An adhesive with some flexibility is ideal to allow for any natural movement or vibration in the countertops that could occur. Choose a product that mentions flexibility or resistance to shock/vibration.

Color Match

Select an adhesive that will best match the color of your quartz slabs. Opt for a transparent glue for light colors or white quartz. Use a tinted glue matching darker quartz colors.

Moisture Protection

Since preventing moisture penetration is a key objective, select a waterproof adhesive that creates a tight seal. Look for “waterproof” or “watertight seal” on the product specifications.

Recommended Adhesive Products

Here are some top-rated adhesive options specifically designed for gluing quartz countertop seams:

  • DuPontTM Joint Adhesive – Designed for solid surfaces. Flexible and shock/vibration resistant. Watertight seal.
  • Simson ISR 70-03 – Specialized for non-porous materials like quartz. Optically clear and colorless. Water and heat resistant.
  • Selleys Liquid Stone – Creates strong, invisible seams. Rapid drying and sets firmly. Made for stone, marble, and quartz.
  • Silicone Adhesives – 100% silicone provides a secure bond and is waterproof once cured. Flexible and withstands vibration.
  • Two-Part Epoxy – Mixed epoxy adhesives provide very strong, durable, water-tight bonds for quartz seams. Long work time for precision application.

Always consult the adhesive manufacturer’s instructions to verify suitability for quartz countertops and proper application techniques.

Steps to Glue the Seams

Once you have the right quartz adhesive, follow these key steps:

  1. Clean the Seams – Use denatured alcohol to fully clean and dry the quartz seam edges. This helps the glue bond properly.
  2. Apply Adhesive – Run a consistent bead of adhesive along the seams according to the product directions. Spread evenly with a putty knife.
  3. Clamp in Place – Position the slabs tightly together and securely clamp the full length of the seams. This provides pressure while curing.
  4. Allow Proper Cure Time – Let the adhesive fully cure for the recommended time before removing clamps. This allows the strongest bond to form.
  5. Clean Up Adhesive – Carefully trim off any excess dried adhesive with a plastic scraper. Avoid scratching the quartz surface.
  6. Seal Seam (Optional) – After the recommended curing time, sealing the seams with a matching caulk adds extra moisture protection.

With the proper quartz adhesive and application technique, you can achieve beautiful, inconspicuous countertop seams that will last for many years.

FAQ About Gluing Quartz Seams

What kind of glue works best for quartz countertops?

Specialty adhesives designed for solid surfaces like quartz work best. Look for products specifically made for non-porous materials to create a waterproof, resilient bond. Popular options are silicone, epoxy, and acrylic-based adhesives.

Can I use regular construction adhesive?

No, regular construction adhesives are not formulated for solid surfaces like quartz. They may not cure properly or create a waterproof seal. Opt for a specialty quartz adhesive.

What is the best way to clamp quartz seams?

Use ratchet clamps or J-clamps spaced about every 6 inches along the seam. Tighten the clamps sufficiently to press the slabs tightly together but not so much as to risk cracking the quartz. Remove clamps only after the adhesive has fully cured.

How long does quartz seam adhesive take to cure?

Cure times vary by product but are generally 12-24 hours. Some may cure more quickly while two-part epoxies can take 48-72 hours. Always follow the specific adhesive manufacturer’s instructions for curing time.

Should I also use caulk on the quartz seams?

While not required, applying a thin bead of color-matched caulk along the cured adhesive line can provide extra insurance against moisture or bacteria getting into seams over time.


Installing quartz countertops often involves joining separate slab pieces to create one continuous surface. Properly gluing the seams is an essential step for strength, sanitation, and aesthetics. Be sure to use the right adhesive specially designed for quartz and non-porous materials. Carefully follow application and curing directions to achieve flawless, lasting seams. With the right knowledge and technique, you can have beautiful quartz countertops that stand the test of time.