Tnemec

Series 104 H.S. Epoxy

High-solids epoxy, 4 mil · US · manufacturer-sourced

Check your container: This countdown is for the High-solids epoxy, 4 mil variant. Similar-looking versions may have different times.

How long before you can recoat Tnemec Series 104 H.S. Epoxy?

Short answer

Ready for another coat: 16–18 hours after application.
Safe to handle: 6 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 High-solids epoxy, 4 mil 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 75°F

  • Safe to handle6 hours
  • Ready for another coat16–18 hours
  • Immersion-ready7 days
  • Recoat window closes60 days

Worth noticing: Recoat inside the window: not before 16–18 hours and not after 60 days.

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

Industrial protective coatings

Coat timeline

Plan the next coat and final use separately

  1. 1
    ApplyUse the High-solids epoxy, 4 mil directions and prepare for steel coating and immersion service.
  2. 2
    Next coatUse the listed recoat milestone; do not substitute touch-dry time.
  3. 3
    Normal useWait for the applicable handling, water or cure milestone.

Check the recoat window

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

Stated times

  • Safe to handle6 hours
  • Recoat window closes60 days
  • Ready for another coat16–18 hours
  • Immersion-ready7 days

From Tnemec product page · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.

Manufacturer website: tnemec.com

Conditions & fine print
  • Stated conditions: 75°F (24°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 US. Formulas can differ between countries; check your container.
  • Safe to handle: The source gives no conditions for this time.
  • Recoat window closes: Applies to Endura-Shield 73, 1074 and 1075.
  • Ready for another coat: The source gives no conditions for this time.
  • Immersion-ready: 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
Tnemec Series 104 H.S. Epoxy
Variant
High-solids epoxy, 4 mil
Region
US
Listed use
steel coating, immersion service
Timed stages recorded
handle, recoat max, recoat min, immersion
Source checked
2026-10-25

Documentation: Official product page · Product page, accessed 2026-10-26

Condition attached to the stated time: The source gives no conditions for this time.

About this product

A high-solids epoxy with a 60 day recoat window for three named topcoats. At 75°F it handles in 6 hours and recoats in 16 to 18.

Using this specific product

Tnemec Series 104 H.S. Epoxy is listed here as the High-solids epoxy, 4 mil version for steel coating and immersion service. 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 epoxy, 4 mil; related versions can use different timing.
  • For steel coating and immersion service, pay particular attention to surface preparation, film thickness, temperature, dew point and pot life.
  • The source gives no conditions for this time. Applies to Endura-Shield 73, 1074 and 1075.

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 page gives a maximum of 60 days for some topcoats. 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

Keep going

Questions

How long before you can recoat this product?

Tnemec states: The page gives handle at 6 hours at 75°F for 4 mils. Conditions: The source gives no conditions for this time.. The page gives a maximum of 60 days for some topcoats. Conditions: Applies to Endura-Shield 73, 1074 and 1075.. The page gives recoating after 16 to 18 hours at 75°F. Conditions: The source gives no conditions for this time.. The page gives immersion after 7 days at 75°F. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

How long can Series 104 wait for Endura-Shield?

The page gives a 60 day maximum for Endura-Shield 73, 1074 and 1075.

How long before this product can be immersed in water?

Tnemec states: The page gives immersion after 7 days at 75°F. 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?

Tnemec states: The page gives handle at 6 hours at 75°F for 4 mils. 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?

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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