Sigma Coatings

Sigmacover 690

Aluminium-pigmented epoxy primer coating · INTL · manufacturer-sourced

Check your container: This countdown is for the Aluminium-pigmented epoxy primer coating variant. Similar-looking versions may have different times.

How long before you can recoat Sigma Coatings Sigmacover 690?

Short answer

Ready for another coat: 12 hours after application.
Safe to touch: 4 hours 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 Aluminium-pigmented epoxy primer coating 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 touch4 hours
  • Safe to handle12 hours
  • Ready for another coat12 hours
  • Full cure5 days
  • Recoat window closes120 days

Worth noticing: Recoat inside the window: not before 12 hours and not after 120 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 touch4 hours
  • Safe to handle12 hours
  • Recoat window closes120 days
  • Ready for another coat12 hours
  • Full cure5 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 41°F or above
  • Region INTL. Formulas can differ between countries; check your container.
  • Safe to touch: At 20°C, up to 125 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 Report outdated information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 Sigmacover 690
Variant
Aluminium-pigmented epoxy primer coating
Region
INTL
Listed use
steel repair, tank exteriors, maintenance
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 125 microns dry.

About this product

An aluminium-pigmented epoxy with a 4 month maximum recoat at 20°C, falling to 3 months at 30°C. For polyurethane topcoats the sheet adds 50% to the minimum.

Using this specific product

Sigma Coatings Sigmacover 690 is listed here as the Aluminium-pigmented epoxy primer coating version for steel repair, tank exteriors, and maintenance. 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 Aluminium-pigmented epoxy primer coating; related versions can use different timing.
  • For steel repair, tank exteriors, and maintenance, pay particular attention to surface preparation, film thickness, temperature, dew point and pot life.
  • At 20°C, up to 125 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 4 months over itself.

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 4 hours. Conditions: At 20°C, up to 125 microns dry.. The sheet gives dry to handle in 12 hours. Conditions: At 20°C.. The sheet gives a maximum overcoating interval of 4 months over itself. Conditions: At 20°C.. The sheet gives a minimum overcoating interval of 12 hours over itself. Conditions: At 20°C.. The sheet gives full cure in 5 days. Conditions: At 20°C.. These are the manufacturer’s stated times, not a guarantee.

How long can Sigmacover 690 wait before overcoating?

The sheet gives a maximum of 4 months at 20°C.

How long does this product take to fully cure?

Sigma Coatings states: The sheet gives full cure in 5 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 4 hours. Conditions: At 20°C, up to 125 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 12 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.

Similar products

All industrial protective coatings