How Long Does Grout Take to Dry on a Backsplash?

Grout drying time is an important consideration when installing a backsplash. Here is a detailed look at how long grout takes to dry on a backsplash, along with tips for achieving the best results.

What Factors Affect Grout Dry Time?

Several key factors impact how long it takes for grout to dry on a backsplash:

Type of Grout

  • Sanded grout dries slower than unsanded grout. It contains sand particles that make it sturdier for wider joints, but also make it dry more slowly.
  • Unsanded grout is finer and dries more quickly than sanded grout. It’s best for narrow grout lines 1/8″ or less.
  • Epoxy grout has a chemical reaction that causes it to cure and harden. It takes longer to dry fully – usually 48-72 hours.

Humidity and Temperature

  • Higher humidity slows grout drying time. For fastest drying, maintain low indoor humidity.
  • Warmer temperatures speed up drying time. Grout dries quickest at 70-80°F.

Grout Joint Width

  • The wider the grout lines, the longer the dry time. Narrower grout lines dry faster.
  • Most backsplashes have 1/8” to 1/4” grout lines. Wider joints take significantly longer to dry.

Thickness of Grout Layer

  • The thicker the layer of grout, the longer the dry time. Don’t overfill joints.
  • Grout lines flush with the tile surface dry fastest.

How Long Does Grout Take to Dry on a Backsplash?

With the above factors in mind, here are some general guidelines for backsplash grout dry times:

  • Unsanded grout: 4-8 hours to become firm, 24 hours to fully cure
  • Sanded grout: 8-12 hours to firm up, 48 hours to fully cure and harden
  • Epoxy grout: 24 hours to become firm, 72 hours to fully cure and harden

However, exact dry times vary based on your unique conditions. Test a small area first to see how the grout dries before grouting the entire backsplash.

Tips for Drying Grout Faster

If you need to speed up grout dry time on your backsplash, here are some useful tips:

  • Use unsanded grout for narrow joints up to 1/8″. It dries significantly faster than sanded grout.
  • Apply in thin layers. Don’t overfill the grout lines.
  • Wipe excess grout off the tile surface so only a thin layer remains in the joints.
  • Allow for airflow in the room. Shut doors/windows can increase humidity.
  • Use a fan directed at the backsplash to improve air circulation.
  • Raise the thermostat to around 75°F to speed drying.
  • Use a dehumidifier to maintain low indoor humidity.
  • Wait 72 hours before getting the backsplash wet. Avoid moisture until grout is fully cured.


How long should I wait before sealing grout?

Wait a full 72 hours before applying a grout sealer on the backsplash. This allows the grout to cure completely. Sealing too early can cause issues.

Can I walk on newly grouted floors right away?

No, stay off freshly grouted floors for at least 24 hours. Walking on damp grout can displace it from joints. Wait until it firms up before regular use.

Should I wet grout lines while grouting a backsplash?

No. Dampening grout lines first can lead to inconsistent drying and color shading. Apply grout directly onto dry tiles and joints.

What’s the best grout to use for a backsplash?

For narrow joints up to 1/8″, unsanded grout is ideal for backsplashes. It spreads smoothly, dries fast, and resists cracking. Make sure it matches the color of your tiles.

Can I speed up epoxy grout drying time?

Unfortunately, there’s no way to accelerate the chemical curing process of epoxy grout. Maintain room temperature at 70°F and wait the full 72 hours.


Allowing adequate dry time for grout on a backsplash is crucial for successful results. Plan your project timeline accordingly, taking into account the faster dry times of unsanded grout compared to sanded or epoxy. Follow drying tips to help speed the process when needed. With some patience, your beautiful new backsplash will have durable, uniform grout lines that enhance the design.