ARDEX P 82 Ultra Prime
Underlayment primer · US · manufacturer-sourced
How long before you can recoat ARDEX P 82 Ultra Prime?
Short answer
Return-to-use gates
Walk, furniture and full traffic open at different times
- Apply the Underlayment primer to a clean, dry subfloor
- Stay off until the foot-traffic time
- Bring in furniture and heavy use later
This product’s stated stages Quoted at 70°F
- Working time ends1 hour
- Ready for another coat3 hours
- Recoat window closes1 day
Worth noticing: Recoat inside the window: not before 3 hours and not after 1 day.
Common mistake: Moving furniture back the day after, while the surface is still soft.
Return-to-use gates
Open the surface gradually instead of treating cure as one moment
Time returning to use
Your countdown
Stated times
- Working time ends1 hour
- Recoat window closes1 day
- Ready for another coat3 hours
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: 70°F (21°C)
- Pot life, recoat and traffic times depend on temperature and film thickness. Follow the current data sheet. Substrate and air must be at least 50°F.
- Apply at 50°F or above
- Region US. Formulas can differ between countries; check your container.
- Working time ends: The source gives no conditions for this time.
- Recoat window closes: At 70°F (21°C).
- Ready for another coat: At 70°F (21°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 Report outdated information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 ARDEX P 82 Ultra Prime
- Variant
- Underlayment primer
- Region
- US
- Listed use
- primer, self-leveling underlayment, concrete subfloors
- Timed stages recorded
- tooling, recoat max, recoat min
- Source checked
- 2026-10-25
Documentation: Technical data sheet copy · Content updated 2024-10-03
Condition attached to the stated time: The source gives no conditions for this time.
About this product
A primer for ARDEX self-leveling underlayments, with a window instead of a single time: dry to a thin, slightly tacky film for 3 to 24 hours at 70°F. Underfloor heating must be off for 48 hours before, during and after the install.
Using this specific product
ARDEX ARDEX P 82 Ultra Prime is listed here as the Underlayment primer version for primer, self-leveling underlayment, and concrete subfloors. For installing or finishing a floor, 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 Underlayment primer; related versions can use different timing.
- For primer, self-leveling underlayment, and concrete subfloors, pay particular attention to subfloor condition, trowel coverage, room temperature and traffic plan.
- The source gives no conditions for this time. At 70°F (21°C).
How to check readiness
Test the least-ventilated area before walking, covering or replacing furniture. The data sheet says to apply within 1 hour of mixing. The data sheet gives a maximum of 24 hours before the underlayment goes on. Before recoating, confirm the first coat matches the manufacturer’s stated condition; if the maximum window passed, check whether sanding is required.
Avoid this mistake
Foot traffic, furniture and rugs can have different return times.
Compare with similar products
- Compare with MAPEI Mapecoat I 600 WRecoat: 3–4 h there, 3 h here.
- Compare with Sika Ucrete HS24 NARecoat: 3 h there, 3 h here.
Questions
How long before you can recoat this product?
ARDEX states: The data sheet says to apply within 1 hour of mixing. Conditions: The source gives no conditions for this time.. The data sheet gives a maximum of 24 hours before the underlayment goes on. Conditions: At 70°F (21°C).. The data sheet says to let the primer dry to a thin, slightly tacky film, minimum 3 hours. Conditions: At 70°F (21°C).. These are the manufacturer’s stated times, not a guarantee.
How long can ARDEX P 82 sit before the underlayment goes on?
The data sheet gives a minimum of 3 hours and a maximum of 24 hours at 70°F. The primer should be a thin, slightly tacky film, and cold or humid air extends the dry time.
How long do I have to work with this product?
ARDEX states: The data sheet says to apply within 1 hour of mixing. 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?
Pot life, recoat and traffic times depend on temperature and film thickness. Follow the current data sheet. Substrate and air must be at least 50°F. Follow the product label for your conditions.