Macropoxy Primer HE N
High-build epoxy primer (European sheet) · EU · manufacturer-sourced
How long before you can recoat Sherwin-Williams Macropoxy Primer HE N?
Short answer
All stated times for Macropoxy Primer HE N
| Milestone | Time | Condition |
|---|---|---|
| Safe to handle | 6 hours | It is 12 hours at 5°C and 3 hours at 30°C. |
| Recoat window closes | 365 days | Pot life is 4 hours at 20°C. |
| Ready for another coat | 6 hours | Handle and recoat share one column. |
| Full cure | 7–14 days | The source gives no conditions for this time. |
Source: Product data sheet Issue 4, rev 07/2026.
Film-build schedule
Recoat has a floor and a ceiling, and film thickness moves both
- Prepare the surface and apply the High-build epoxy primer (European sheet) to the stated thickness
- Recoat inside the window the data sheet gives
- Return to service only at the stated cure
This product’s stated stages Quoted at 68°F
- Safe to handle6 hours
- Ready for another coat6 hours
- Full cure7 days to 2 weeks
- Recoat window closes365 days
Worth noticing: Recoat inside the window: not before 6 hours and not after 365 days.
Common mistake: Recoating after the maximum window has closed; the next coat may not bond without abrading.
Coat timeline
Plan the next coat and final use separately
- 1ApplyUse the High-build epoxy primer (European sheet) directions and prepare for epoxy primer and steel.
- 2Next coatUse the listed recoat milestone; do not substitute touch-dry time.
- 3Normal useWait for the applicable handling, water or cure milestone.
Check the recoat window
Your countdown
Stated times
- Safe to handle6 hours
- Recoat window closes365 days
- Ready for another coat6 hours
- Full cure7–14 days
From Sherwin-Williams data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: sherwin-williams.com
Conditions & fine print
- Stated conditions: 68°F (20°C)
- Protective-coating times are for the stated film thickness, temperature and humidity. Cold steel, thick films and poor airflow lengthen them. Follow the current data sheet.
- Region EU. Formulas can differ between countries; check your container.
- Safe to handle: It is 12 hours at 5°C and 3 hours at 30°C.
- Recoat window closes: Pot life is 4 hours at 20°C.
- Ready for another coat: Handle and recoat share one column.
- Full cure: The source gives no conditions for this time.
- 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
- Sherwin-Williams Macropoxy Primer HE N
- Variant
- High-build epoxy primer (European sheet)
- Region
- EU
- Listed use
- epoxy primer, steel
- Timed stages recorded
- handle, recoat max, recoat min, full cure
- Source checked
- 2026-10-25
Documentation: Technical data sheet · Product data sheet Issue 4, rev 07/2026
Condition attached to the stated time: It is 12 hours at 5°C and 3 hours at 30°C.
About this product
An epoxy primer where handle and recoat share one time, 6 hours at 20°C, and the full cure takes 1 to 2 weeks.
Using this specific product
Sherwin-Williams Macropoxy Primer HE N is listed here as the High-build epoxy primer (European sheet) version for epoxy primer and steel. For coating steel or industrial surfaces, 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 High-build epoxy primer (European sheet); related versions can use different timing.
- For epoxy primer and steel, pay particular attention to surface preparation, film thickness, temperature, dew point and pot life.
- It is 12 hours at 5°C and 3 hours at 30°C. Pot life is 4 hours at 20°C. Handle and recoat share one column. The source gives no conditions for this time.
How to check readiness
Check dry film thickness and the recoat window before the next coat. Lift or move the item gently and avoid twisting the bond or pressing finished faces together. The sheet gives a maximum of 1 year. 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
Recoat windows can close; past the maximum, abrading is usually required.
Compare with similar products
- Compare with Hempel Hempaprime Multi 500 WinterRecoat: 6 h there, 6 h here.
- Compare with Hempel Hempadur MIO 47950Recoat: 6 h there, 6 h here.
Questions
How long before you can recoat this product?
Sherwin-Williams states: The sheet gives handle and recoat at 6 hours at 20°C for 100 µm. Conditions: It is 12 hours at 5°C and 3 hours at 30°C.. The sheet gives a maximum of 1 year. Conditions: Pot life is 4 hours at 20°C.. The sheet gives recoating at 6 hours at 20°C. Conditions: Handle and recoat share one column.. The sheet gives a cure of 1 to 2 weeks. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.
How long between coats of Macropoxy Primer HE N?
The sheet gives 6 hours at 20°C, 12 hours at 5°C and 3 hours at 30°C.
How long does this product take to fully cure?
Sherwin-Williams states: The sheet gives a cure of 1 to 2 weeks. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.
How long until this product is safe to handle?
Sherwin-Williams states: The sheet gives handle and recoat at 6 hours at 20°C for 100 µm. Conditions: It is 12 hours at 5°C and 3 hours at 30°C.. These are the manufacturer’s stated times, not a guarantee.
What affects how long this product takes to dry or cure?
Protective-coating times are for the stated film thickness, temperature and humidity. Cold steel, thick films and poor airflow lengthen them. Follow the current data sheet. Follow the product label for your conditions.
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