Gaco

GacoFlex UB64C Series

Compliant two-component polyurethane base coat · US · manufacturer-sourced

Check your container: This countdown is for the Compliant two-component polyurethane base coat variant. Similar-looking versions may have different times.

How long does GacoFlex UB64C Series take to dry?

Short answer

Set / hardened: 2 hours after application.
Ready for another coat: 2 hours after application.
Roof coatings and roofing sealants

Weather-window plan

Rain-ready comes long before fully cured

  1. Apply the Compliant two-component polyurethane base coat to a dry, clean roof surface
  2. Keep rain off for the stated period
  3. Allow foot traffic only at the stated time

This product’s stated stages Quoted at 73°F and 50% humidity

  • Working time ends45 minutes to 1 hour
  • Set2 hours
  • Ready for another coat2 hours
  • Light foot traffic1 day
  • Heavy traffic2 days
  • Recoat window closes3 days

Worth noticing: Recoat inside the window: not before 2 hours and not after 3 days.

Common mistake: Starting a coat when the afternoon forecast turns wet.

Roof coatings and roofing sealants

Coat timeline

Plan the next coat and final use separately

  1. 1
    ApplyUse the Compliant two-component polyurethane base coat directions and prepare for urethane base coat.
  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.

Plan around the weather

When did you apply the coating?
Conditions that affect drying
Where?
Thickness

Stated times

  • Working time ends45 minutes to 1 hour
  • Set / hardened2 hours
  • Recoat window closes3 days
  • Ready for another coat2 hours
  • Light foot traffic1 day
  • Heavy traffic2 days

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

Manufacturer website: gaco.com

Conditions & fine print
  • Stated conditions: 73°F (23°C) and 50% relative humidity
  • Floor coating times assume the stated temperature and humidity. Cold slabs, thick coats and damp concrete lengthen them. Follow the current data sheet.
  • Apply at 33°F or above
  • Region US. Formulas can differ between countries; check your container.
  • Working time ends: At 70°F (21°C) and 50% relative humidity.
  • Set / hardened: At 70°F (21°C) and 50% relative humidity.
  • Recoat window closes: The source gives no conditions for this time.
  • Ready for another coat: At 70°F (21°C) and 50% relative humidity.
  • Light foot traffic: The source gives no conditions for this time.
  • Heavy traffic: 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
Gaco GacoFlex UB64C Series
Variant
Compliant two-component polyurethane base coat
Region
US
Listed use
urethane base coat
Timed stages recorded
tooling, set, recoat max, recoat min, light foot
Source checked
2026-10-25

Documentation: Technical data sheet · PDS Revised 08/2022

Condition attached to the stated time: At 70°F (21°C) and 50% relative humidity.

About this product

A base coat with a recoat window you can plan around: ready at 2 hours, closed at 72. Its sheet gives two different pot lives, 45 minutes in the properties and usually 1 hour in the application text, so mix small batches until you know your weather.

Using this specific product

Gaco GacoFlex UB64C Series is listed here as the Compliant two-component polyurethane base coat version for urethane base coat. For coating or sealing a roof, 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 Compliant two-component polyurethane base coat; related versions can use different timing.
  • For urethane base coat, pay particular attention to roof temperature, dew, rain in the forecast, film thickness and how many coats are needed.
  • At 70°F (21°C) and 50% relative humidity. The source gives no conditions for this time.

How to check readiness

Check that the surface is dry and that no rain or dew is forecast inside the stated window. The data sheet gives a pot life of 45 minutes in one place and usually 1 hour in the application section. The data sheet says the coating will set within 2 hours. The data sheet says the base coat must be top coated within 72 hours after application is complete.

Avoid this mistake

Rain resistance and walkable are earlier milestones than the full cure the roof system is rated for.

Compare with similar products

Keep going

Questions

How long does this product take to dry?

Gaco states: The data sheet gives a pot life of 45 minutes in one place and usually 1 hour in the application section. Conditions: At 70°F (21°C) and 50% relative humidity.. The data sheet says the coating will set within 2 hours. Conditions: At 70°F (21°C) and 50% relative humidity.. The data sheet says the base coat must be top coated within 72 hours after application is complete. Conditions: The source gives no conditions for this time.. The data sheet says to recoat after a minimum of 2 hours of cure. Conditions: At 70°F (21°C) and 50% relative humidity.. The data sheet allows light foot traffic after a minimum of 24 hours of cure. Conditions: The source gives no conditions for this time.. For vehicular traffic the data sheet adds 24 hours to the 24 hour foot-traffic cure, which is 48 hours. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

Why does the UB64C sheet list two pot lives?

The properties section gives 45 minutes at 70°F and 50% relative humidity, and the application section says usually one hour. The safe plan is the shorter figure.

How long do I have to work with this product?

Gaco states: The data sheet gives a pot life of 45 minutes in one place and usually 1 hour in the application section. Conditions: At 70°F (21°C) and 50% relative humidity.. These are the manufacturer’s stated times, not a guarantee.

How long before I can apply a second coat of this product?

Gaco states: The data sheet says to recoat after a minimum of 2 hours of cure. Conditions: At 70°F (21°C) and 50% relative humidity.. These are the manufacturer’s stated times, not a guarantee.

How long before I can walk on tile set with this product?

Gaco states: The data sheet allows light foot traffic after a minimum of 24 hours of cure. 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?

Floor coating times assume the stated temperature and humidity. Cold slabs, thick coats and damp concrete lengthen them. Follow the current data sheet. Follow the product label for your conditions.

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