MAS FLAG Resin with Slow Hardener
Slow hardener · US · manufacturer-sourced
How long does MAS Epoxies MAS FLAG Resin with Slow Hardener take to dry?
Short answer
Two-part cure ladder
Pot life, set and full cure all run off the mix time
- Mix the Slow hardener in the exact ratio
- Work inside the pot life
- Do not load until the stated cure
This product’s stated stages Quoted at 77°F
- Working time ends40 minutes
- Tack-free5 hours
- Full cure5 days
Worth noticing: Working time is only 40 minutes; the next stated stage, tack-free, is 5 hours.
Common mistake: Mixing a large batch in a warm room; the pot life is shorter than the sheet suggests.
Bond-strength path
Assembly, handling and full load are different stages
Time the epoxy cure
Your countdown
Stated times
- Working time ends40 minutes
- Tack-free5 hours
- Full cure5 days
From MAS Epoxies data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: masepoxies.com
Conditions & fine print
- Stated conditions: 77°F (25°C)
- Pot life and cure time shorten in heat, with larger mixed batches and in thick sections. Follow the current data sheet for mixing, surface preparation and loading. The data sheet says material temperatures should not be below 55°F when mixing. It lists gel time, not pot life.
- Apply at 55°F or above
- Region US. Formulas can differ between countries; check your container.
- Working time ends: At 77°F (25°C).
- Tack-free: The source gives no conditions for this time.
- 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 Report outdated information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
- MAS Epoxies MAS FLAG Resin with Slow Hardener
- Variant
- Slow hardener
- Region
- US
- Listed use
- laminating epoxy, casting, coating
- Timed stages recorded
- tooling, tack free, full cure
- Source checked
- 2026-10-25
Documentation: Technical data sheet · 6/27/2022
Condition attached to the stated time: At 77°F (25°C).
About this product
MAS FLAG Resin is sold with Fast, Medium and Slow hardeners; this page is the slow one. The data sheet lists a table of gel time (10, 25 and 40 minutes), tack-free time and full cure for the three.
Using this specific product
MAS Epoxies MAS FLAG Resin with Slow Hardener is listed here as the Slow hardener version for laminating epoxy, casting, and coating. For mixing and curing epoxy, 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 Slow hardener; related versions can use different timing.
- For laminating epoxy, casting, and coating, pay particular attention to mix ratio, batch size, temperature and pour thickness.
- At 77°F (25°C). The source gives no conditions for this time.
How to check readiness
Check the coolest or thickest part for firmness before sanding, demolding or loading. The data sheet gives a gel time of 40 minutes for a 150 gram mass. The data sheet gives 5 hours to tack-free. Reserve full cure for demanding use, chemicals, washing, immersion or load—not merely gentle handling.
Avoid this mistake
A larger batch can heat faster while a thin film may cure more slowly.
Compare with similar products
- Compare with TotalBoat TableTop EpoxyTack-free: 4 h there, 5 h here.
- Compare with TotalBoat Penetrating EpoxyTack-free: 1.5–2 days there, 5 h here.
Questions
How long does this product take to dry?
MAS Epoxies states: The data sheet gives a gel time of 40 minutes for a 150 gram mass. Conditions: At 77°F (25°C).. The data sheet gives 5 hours to tack-free. Conditions: The source gives no conditions for this time.. The data sheet gives 5 days for a full cure. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.
What changes if I pick the slow hardener for MAS FLAG Resin?
The data sheet's table: Slow hardener gels in 40 minutes (150 gram mass at 77°F), is tack-free in 5 hours and fully cures in 5 days. The other two hardeners trade those numbers one way or the other: Fast 10 minutes / 2 hours / 2 days, Medium 25 minutes / 3 hours / 3.5 days, Slow 40 minutes / 5 hours / 5 days.
How long does this product take to fully cure?
MAS Epoxies states: The data sheet gives 5 days for a full cure. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.
How long do I have to work with this product?
MAS Epoxies states: The data sheet gives a gel time of 40 minutes for a 150 gram mass. Conditions: At 77°F (25°C).. These are the manufacturer’s stated times, not a guarantee.
What affects how long this product takes to dry or cure?
Pot life and cure time shorten in heat, with larger mixed batches and in thick sections. Follow the current data sheet for mixing, surface preparation and loading. The data sheet says material temperatures should not be below 55°F when mixing. It lists gel time, not pot life. Follow the product label for your conditions.