Sigma Coatings

Sigmazinc 109 HS

High-solids zinc-rich epoxy primer · INTL · manufacturer-sourced

Check your container: This countdown is for the High-solids zinc-rich epoxy primer variant. Similar-looking versions may have different times.

How long before you can recoat Sigma Coatings Sigmazinc 109 HS?

Short answer

Ready for another coat: 4 hours after application.
Safe to touch: 150 minutes after application.
Industrial protective coatings

Film-build schedule

Recoat has a floor and a ceiling, and film thickness moves both

  1. Prepare the surface and apply the High-solids zinc-rich epoxy primer to the stated thickness
  2. Recoat inside the window the data sheet gives
  3. Return to service only at the stated cure

This product’s stated stages Quoted at 68°F

  • Safe to touch2 hours 30 min
  • Safe to handle3 hours
  • Ready for another coat4 hours
  • Full cure7 days
  • Recoat window closes90 days

Worth noticing: Recoat inside the window: not before 4 hours and not after 90 days.

Common mistake: Recoating after the maximum window has closed; the next coat may not bond without abrading.

Check the recoat window

When did this coat go on?
Conditions that affect drying
Where?
Thickness

Stated times

  • Safe to touch150 minutes
  • Safe to handle3 hours
  • Recoat window closes90 days
  • Ready for another coat4 hours
  • Full cure7 days

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

Manufacturer website: None

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.
  • Apply at 32°F or above
  • Region INTL. Formulas can differ between countries; check your container.
  • Safe to touch: At 20°C, up to 100 microns dry.
  • Safe to handle: At 20°C.
  • Recoat window closes: At 20°C.
  • Ready for another coat: At 20°C.
  • Full cure: 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 Report outdated information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
Sigma Coatings Sigmazinc 109 HS
Variant
High-solids zinc-rich epoxy primer
Region
INTL
Listed use
zinc primer, bridges, marine steel
Timed stages recorded
touch, handle, recoat max, recoat min, full cure
Source checked
2026-10-25

Documentation: Technical data sheet · Technical data sheet

Condition attached to the stated time: At 20°C, up to 100 microns dry.

About this product

A zinc-rich epoxy primer that cures down to 0°C: touch dry in 12 hours at 0°C against 2.5 hours at 20°C. The 3 month recoat limit applies at every temperature on the sheet.

Using this specific product

Sigma Coatings Sigmazinc 109 HS is listed here as the High-solids zinc-rich epoxy primer version for zinc primer, bridges, and marine 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-solids zinc-rich epoxy primer; related versions can use different timing.
  • For zinc primer, bridges, and marine steel, pay particular attention to surface preparation, film thickness, temperature, dew point and pot life.
  • At 20°C, up to 100 microns dry. At 20°C.

How to check readiness

Check dry film thickness and the recoat window before the next coat. Touch only a hidden edge first; a dry surface can conceal a soft layer underneath. Lift or move the item gently and avoid twisting the bond or pressing finished faces together. The sheet gives a maximum overcoating interval of 3 months.

Avoid this mistake

Recoat windows can close; past the maximum, abrading is usually required.

Compare with similar products

Keep going

Questions

How long before you can recoat this product?

Sigma Coatings states: The sheet gives dry to touch in 2.5 hours. Conditions: At 20°C, up to 100 microns dry.. The sheet gives dry to handle in 3 hours. Conditions: At 20°C.. The sheet gives a maximum overcoating interval of 3 months. Conditions: At 20°C.. The sheet gives a minimum overcoating interval of 4 hours. Conditions: At 20°C.. The sheet gives full cure in 7 days. Conditions: At 20°C.. These are the manufacturer’s stated times, not a guarantee.

Can Sigmazinc 109 HS be applied at 0°C?

The sheet allows application and curing down to 0°C on a dry, ice-free surface.

How long does this product take to fully cure?

Sigma Coatings states: The sheet gives full cure in 7 days. Conditions: At 20°C.. These are the manufacturer’s stated times, not a guarantee.

How long until this product is safe to touch?

Sigma Coatings states: The sheet gives dry to touch in 2.5 hours. Conditions: At 20°C, up to 100 microns dry.. These are the manufacturer’s stated times, not a guarantee.

How long until this product is safe to handle?

Sigma Coatings states: The sheet gives dry to handle in 3 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?

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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