A 35 Rapid Hardening Cement
Rapid-hardening binder for screeds and repair (international sheet) · INTL · manufacturer-sourced
How long before you can walk on ARDEX A 35 Rapid Hardening Cement?
Short answer
Placement-to-service plan
Set, hardening and loading come days apart
- Place and finish the Rapid-hardening binder for screeds and repair (international sheet)
- Keep it moist or protected as directed
- Load it only at the stated strength time
This product’s stated stages Quoted at 68°F
- Working time ends1 hour
- Light foot traffic3 hours
- Normal use1 day
Worth noticing: Working time is only 1 hour; the next stated stage, light foot traffic, is 3 hours.
Common mistake: Driving on it because it feels hard; strength keeps building for days.
Time the concrete cure
Your countdown
Stated times
- Working time ends1 hour
- Light foot traffic3 hours
- Normal use1 day
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)
- Floor times assume the stated temperature and humidity. Cold slabs, thick coats and damp subfloors lengthen them. Follow the current data sheet.
- Region INTL. Formulas can differ between countries; check your container.
- Working time ends: At 20°C.
- Light foot traffic: At 20°C.
- Normal use: 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 Report outdated information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 35 Rapid Hardening Cement
- Variant
- Rapid-hardening binder for screeds and repair (international sheet)
- Region
- INTL
- Listed use
- rapid screeds, repair, underfloor heating screeds
- Timed stages recorded
- tooling, light foot, normal use
- Source checked
- 2026-10-25
Documentation: Technical data sheet · Sheet rev 28 Jan 2026
Condition attached to the stated time: At 20°C.
About this product
A rapid-hardening cement for screeds: walkable in 3 hours and in full use after a day. The sheet adds 3 days before floor heating is started.
Using this specific product
ARDEX A 35 Rapid Hardening Cement is listed here as the Rapid-hardening binder for screeds and repair (international sheet) version for rapid screeds, repair, and underfloor heating screeds. 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 Rapid-hardening binder for screeds and repair (international sheet); related versions can use different timing.
- For rapid screeds, repair, and underfloor heating screeds, 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 about 1 hour. Try a protected edge first and avoid turning, dragging or concentrated loads. The sheet gives full use after 1 day.
Avoid this mistake
Early strength, coating readiness and full cure are separate decisions.
Compare with similar products
- Compare with Ringsend Simiron Cure & SealLight foot traffic: 3–4 h there, 3 h here.
- Compare with Sakrete Fast SetLight foot traffic: 3 h there, 3 h here.
Questions
How long before you can walk on this product?
ARDEX states: The sheet gives a working time of about 1 hour. Conditions: At 20°C.. The sheet gives walking after 3 hours. Conditions: At 20°C.. The sheet gives full use after 1 day. Conditions: At 20°C.. These are the manufacturer’s stated times, not a guarantee.
When can I switch on floor heating over ARDEX A 35?
The sheet gives floor heating start after 3 days.
How long do I have to work with this product?
ARDEX states: The sheet gives a working time of about 1 hour. 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?
Floor times assume the stated temperature and humidity. Cold slabs, thick coats and damp subfloors lengthen them. Follow the current data sheet. Follow the product label for your conditions.