MAS Epoxies
Medium Epoxy Hardener, Pint - Mas Epoxies
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Medium Epoxy Hardener, Quart - Mas Epoxies
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Medium Epoxy Hardener, Half-Gallon - Mas Epoxies
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After mixing resin and medium hardener, you have 15 minutes to get it out of the cup and approximately 3 hours of open working at 70°F. We highly recommend this hardener with FLAG Resin. Mix with appropriate MAS resins in a 2 parts resin to 1 part hardener ratio.

Storage Life: A minimum of 12 months in a sealed container at ambient temperatures.


  • Overnight sandability.
  • No blush.
  • Smooth finish.
  • Blendable with slow or fast hardener for customized working and curing times.

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Color (Gardner) 3 Temperature Resin/Medium
Mix Ratio 2:1 Resin to Hardener Fahrenheit Pot Life Thin Film Set Full Cure
Viscosity @ 77° F 200 cps 95° 6.5 min 1.5 hr 42 hrs
Specific Gravity @ 77° F 0.0998 86° 9.75 min 2.25 hrs 63 hrs
Flash Point (closed cup) 234° F 77° 13 min 3 hrs 3.5 days
Mixed Viscosity w/ MAS Resin @ 77° F 400 - 500 cps 68° 19.5 min 4.5 hrs 5.25 days
Peak Exotherm (100mg mix @ 77° F) 250° F 59° 26 min 6 hrs 7 days

'MAS Epoxies are the most advanced, high performance and user-friendly epoxy formulas in the world. We support all our products with knowledgeable, easy to reach staff, and provide a 100% money-back guarantee. Contact Mas Epoxies at 1-888-627-3769'

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