Custom Building Products

CustomBlend LHT Large & Heavy Tile Mortar

Powder · US · manufacturer-sourced

Check your container: This countdown is for the Powder variant. Similar-looking versions may have different times.

How long before you can grout over Custom Building Products CustomBlend LHT Large & Heavy Tile Mortar?

Short answer

Ready for grout: 1 day after application.
Light foot traffic: 1 day after application.
Grout & tile mortar

Grout wait-and-wash

Wipe-off, light foot traffic and sealing each have their own wait

  1. Pack the joints with Powder
  2. Wipe off inside the stated window
  3. Seal and use only after the stated cure

This product’s stated stages

  • Ready for grout1 day
  • Light foot traffic1 day
  • Heavy traffic7–10 days

Worth noticing: Ready for grout at 1 day; heavy traffic at 7–10 days.

Common mistake: Sealing or soaking a grout joint that has set but not fully dried.

Grout & tile mortar

Return-to-use gates

Open the surface gradually instead of treating cure as one moment

Touch / inspectA surface check only
Foot trafficUse the stated walking time
Heavy useWait for furniture, water or vehicle readiness

Time the grout cure

When was the grout applied?
Conditions that affect drying
Where?
Thickness

Stated times

  • Ready for grout1 day
  • Light foot traffic1 day
  • Heavy traffic7–10 days

From Custom Building Products data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.

Manufacturer website: custombuildingproducts.com

Conditions & fine print
  • Stated conditions: Not stated in the data sheet
  • Times depend on temperature, humidity, substrate and tile type. Follow the current data sheet for your exact setting bed and application. The data sheet lists a pot life of more than 2 hours and an open time of more than 20 minutes (A118.4). Bond development needs ambient temperatures between 50 and 100°F for 72 hours.
  • Temperature range: 50°F to 90°F
  • Region US. Formulas can differ between countries; check your container.
  • Ready for grout: The source gives no conditions for this time.
  • Light foot traffic: The source gives no conditions for this time.
  • Heavy traffic: The source gives no conditions for this time.
  • Entered from the cited manufacturer documentation. Check the current label for the exact formula and region. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Confirm this is your product

Closely named formulas, colors and regional versions can use different times. Match these details to your container before starting a countdown.

Exact listing
Custom Building Products CustomBlend LHT Large & Heavy Tile Mortar
Variant
Powder
Region
US
Listed use
large format tile, heavy tile, thin set
Timed stages recorded
grout ready, light foot, heavy traffic
Source checked
2026-10-25

Documentation: Technical data sheet · February 19, 2026

Condition attached to the stated time: The source gives no conditions for this time.

About this product

A large and heavy tile mortar from Custom Building Products. The 2026 data sheet is unusually specific about heavy loads: 7 to 10 days before heavy or vehicular traffic, against one day for grouting and light use.

Using this specific product

Custom Building Products CustomBlend LHT Large & Heavy Tile Mortar is listed here as the Powder version for large format tile, heavy tile, and thin set. For grouting tile, the useful question is not simply whether the surface looks finished—it is whether the exact next-action milestone shown above has been reached.

Before you start

  • Confirm the package says Powder; related versions can use different timing.
  • For large format tile, heavy tile, and thin set, pay particular attention to joint depth, water ratio, cleanup and room conditions.
  • The source gives no conditions for this time.

How to check readiness

Inspect shaded joints and verify the stated water or traffic milestone. The data sheet says to allow 24 hours before grouting and light traffic. Try a protected edge first and avoid turning, dragging or concentrated loads. Open the area gradually and keep heavy or hot tires off until the full stated milestone.

Avoid this mistake

Color change alone does not prove the joint is ready for immersion.

Compare with similar products

Keep going

Questions

How long before you can grout over this product?

Custom Building Products states: The data sheet says to allow 24 hours before grouting and light traffic. Conditions: The source gives no conditions for this time.. The data sheet says to allow 24 hours before light traffic. Conditions: The source gives no conditions for this time.. The data sheet says to allow 7 to 10 days before heavy or vehicular traffic. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

Can I park or roll heavy loads over tile set with CustomBlend LHT after a day?

No. The data sheet allows grouting and light traffic after 24 hours but says to wait 7 to 10 days before heavy or vehicular traffic.

How long before I can walk on tile set with this product?

Custom Building Products states: The data sheet says to allow 24 hours before light traffic. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

How long before heavy traffic is safe on this product?

Custom Building Products states: The data sheet says to allow 7 to 10 days before heavy or vehicular traffic. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

What affects how long this product takes to dry or cure?

Times depend on temperature, humidity, substrate and tile type. Follow the current data sheet for your exact setting bed and application. The data sheet lists a pot life of more than 2 hours and an open time of more than 20 minutes (A118.4). Bond development needs ambient temperatures between 50 and 100°F for 72 hours. Follow the product label for your conditions.

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