Custom Building Products

SpeedSlope Rapid Setting Sloping Mortar

Powder (all sizes) · US · not yet reviewed

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

How long before you can tile over Custom Building Products SpeedSlope Rapid Setting Sloping Mortar?

Short answer

Ready for tile: 1 hour after application.
Ready for floor covering: 6–12 hours after application.
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

Calculate return-to-use time

When was the material placed?
Conditions that affect drying
Where?
Thickness

Stated times

  • Working time ends30 minutes
  • Ready for tile1 hour
  • Ready for floor covering6–12 hours
  • Light foot traffic2–3 hours
  • Heavy traffic12 hours

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
  • RedGard waterproofing can go over it after 60 minutes. Ambient conditions, surfaces and materials should stay above 50°F (10°C) or below 90°F (32°C) for 72 hours. The data sheet gives no grouting wait. Concrete substrates must cure 28 days before bonding.
  • Region US. Formulas can differ between countries; check your container.
  • Working time ends: The data sheet does not state pot life or open time.
  • Ready for tile: Drying and curing times depend on ambient and surface temperature and humidity.
  • Ready for floor covering: Some flooring finishes may need longer to reach lower moisture levels.
  • Light foot traffic: Drying and curing times depend on ambient and surface temperature and humidity.
  • Heavy traffic: Drying and curing times depend on ambient and surface temperature and humidity.
  • Entered from the manufacturer source; second review pending. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Using this specific product

Custom Building Products SpeedSlope Rapid Setting Sloping Mortar is listed here as the Powder (all sizes) version for shower pan, sloping mortar, and mud bed. 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 (all sizes); related versions can use different timing.
  • For shower pan, sloping mortar, and mud bed, pay particular attention to joint depth, water ratio, cleanup and room conditions.
  • The data sheet does not state pot life or open time. Drying and curing times depend on ambient and surface temperature and humidity. Some flooring finishes may need longer to reach lower moisture levels.

How to check readiness

Inspect shaded joints and verify the stated water or traffic milestone. Working time is about 30 minutes, covering roughly a 3 ft x 5 ft area per placement. Tile installations can go over it after 60 minutes. Moisture-sensitive flooring can go over it after 6 to 12 hours.

Avoid this mistake

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

Questions

How long before you can tile over this product?

Custom Building Products states: Working time is about 30 minutes, covering roughly a 3 ft x 5 ft area per placement. Conditions: The data sheet does not state pot life or open time.. Tile installations can go over it after 60 minutes. Conditions: Drying and curing times depend on ambient and surface temperature and humidity.. Moisture-sensitive flooring can go over it after 6 to 12 hours. Conditions: Some flooring finishes may need longer to reach lower moisture levels.. Foot traffic is allowed after 2 to 3 hours. Conditions: Drying and curing times depend on ambient and surface temperature and humidity.. Vehicular traffic is allowed after 12 hours. Conditions: Drying and curing times depend on ambient and surface temperature and humidity.. These are the manufacturer’s stated times, not a guarantee.

How long before I can install flooring over this product?

Custom Building Products states: Moisture-sensitive flooring can go over it after 6 to 12 hours. Conditions: Some flooring finishes may need longer to reach lower moisture levels.. These are the manufacturer’s stated times, not a guarantee.

How long do I have to work with this product?

Custom Building Products states: Working time is about 30 minutes, covering roughly a 3 ft x 5 ft area per placement. Conditions: The data sheet does not state pot life or open time.. These are the manufacturer’s stated times, not a guarantee.

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

Custom Building Products states: Foot traffic is allowed after 2 to 3 hours. Conditions: Drying and curing times depend on ambient and surface temperature and humidity.. These are the manufacturer’s stated times, not a guarantee.

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

RedGard waterproofing can go over it after 60 minutes. Ambient conditions, surfaces and materials should stay above 50°F (10°C) or below 90°F (32°C) for 72 hours. The data sheet gives no grouting wait. Concrete substrates must cure 28 days before bonding. Follow the product label for your conditions.

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