ARDEX

A 45 Rapid Repair Mortar

Fast-setting cementitious repair (NZ) · NZ · manufacturer-sourced

Check your container: This countdown is for the Fast-setting cementitious repair (NZ) variant. Similar-looking versions may have different times.

How long does ARDEX A 45 Rapid Repair Mortar take to dry?

Short answer

Set / hardened: 15 minutes to 1 hour after application.
Light foot traffic: 90 minutes after application.
Concrete & repair

Placement-to-service plan

Set, hardening and loading come days apart

  1. Place and finish the Fast-setting cementitious repair (NZ)
  2. Keep it moist or protected as directed
  3. Load it only at the stated strength time

This product’s stated stages Quoted at 68°F

  • Working time ends10–15 minutes
  • Set15 minutes to 1 hour
  • Light foot traffic1 hour 30 min

Worth noticing: Working time is only 10–15 minutes; the next stated stage, set, is 15 minutes to 1 hour.

Common mistake: Driving on it because it feels hard; strength keeps building for days.

Time the concrete cure

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

Stated times

  • Working time ends10–15 minutes
  • Set / hardened15 minutes to 1 hour
  • Light foot traffic90 minutes

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

Manufacturer website: ardex.com

Conditions & fine print
  • Stated conditions: 68°F (20°C)
  • Times depend on temperature, humidity, film or bead thickness and airflow. Follow the current data sheet and label.
  • Apply at 50°F or above
  • Region NZ. Formulas can differ between countries; check your container.
  • Working time ends: At 20°C.
  • Set / hardened: At 20°C.
  • Light foot traffic: At 20°C.
  • 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 Report outdated information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
ARDEX A 45 Rapid Repair Mortar
Variant
Fast-setting cementitious repair (NZ)
Region
NZ
Listed use
rapid concrete repair, doorway repairs, trip hazards
Timed stages recorded
tooling, set, light foot
Source checked
2026-10-25

Documentation: Technical data sheet · Data sheet, 8 Apr 2003

Condition attached to the stated time: At 20°C.

About this product

A repair mortar for jobs that cannot be closed for long: placed in 10 to 15 minutes, set in an hour, trafficked in 90 minutes. The sheet applies above 10°C.

Using this specific product

ARDEX A 45 Rapid Repair Mortar is listed here as the Fast-setting cementitious repair (NZ) version for rapid concrete repair, doorway repairs, and trip hazards. For repairing concrete or masonry, 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 Fast-setting cementitious repair (NZ); related versions can use different timing.
  • For rapid concrete repair, doorway repairs, and trip hazards, pay particular attention to substrate moisture, depth, temperature and protection from traffic.
  • At 20°C.

How to check readiness

Check the slowest, coolest section before loading or coating. The sheet gives a working time of 10 to 15 minutes. The sheet gives initial set at 15 minutes and final set at 60 minutes. Try a protected edge first and avoid turning, dragging or concentrated loads.

Avoid this mistake

Early strength, coating readiness and full cure are separate decisions.

Compare with similar products

Keep going

Questions

How long does this product take to dry?

ARDEX states: The sheet gives a working time of 10 to 15 minutes. Conditions: At 20°C.. The sheet gives initial set at 15 minutes and final set at 60 minutes. Conditions: At 20°C.. The sheet gives traffic after 1.5 hours. Conditions: At 20°C.. These are the manufacturer’s stated times, not a guarantee.

How soon can I walk on ARDEX A 45?

The sheet gives traffic after 1.5 hours at 20°C.

How long do I have to work with this product?

ARDEX states: The sheet gives a working time of 10 to 15 minutes. Conditions: At 20°C.. These are the manufacturer’s stated times, not a guarantee.

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

ARDEX states: The sheet gives traffic after 1.5 hours. Conditions: At 20°C.. 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, film or bead thickness and airflow. Follow the current data sheet and label. Follow the product label for your conditions.

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