Custom Building Products

SimpleGrout Pre-Mixed Grout

All colors · US · not yet reviewed

Short answer

Water-ready: 3–7 days after application.
Full cure: 1 day after application.

Start the clock

When did you apply it?
Outdoors, temperature
Where?
Thickness

Stated times

  • Full cure1 day
  • Water-ready3–7 days

From Custom Building Products data sheet · checked 2026-10-24. Anything not listed isn’t stated by the manufacturer.

Conditions & fine print
  • Stated conditions: Above 50°F (10°C)
  • Keep surfaces and materials between 50°F and 100°F for 72 hours. Wait 4 hours before wiping haze. Not for steam rooms or areas with prolonged water exposure. On shower floors, the mortar bed needs at least 4 days to cure first.
  • Temperature range: 50°F to 100°F
  • Region US. Formulas can differ between countries; check your container.
  • Full cure: Above 50°F
  • Water-ready: 3 days shower walls; 7 days shower floors
  • Entered from the manufacturer source; second review pending. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Questions

How long before SimpleGrout Pre-Mixed Grout can get wet?

Custom Building Products states: Allow 3 days prior to water exposure for shower walls and 7 days for shower floors. Conditions: 3 days shower walls; 7 days shower floors. This is the manufacturer’s stated time, not a guarantee.

How long before SimpleGrout Pre-Mixed Grout is full cure?

Custom Building Products states: Cure: typically 24 hours for temperature above 50°F (10°C). Conditions: Above 50°F. This is the manufacturer’s stated time, not a guarantee.

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