System Three medium hardener
System Three System Three epoxy
  • System Three medium hardener

System Three Medium Hardener

System Three Medium is the most common epoxy hardener used in the System Three Resin system. When selecting a hardener, consider the minimum temperature expected during application and cure time in relation to pot life. Combine System Three hardeners to create a continuous range of cure times within the parameters of the Fast, Medium and Slow.
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$22.33 / pt
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Tech Spec Product Info User Generated Content
Pot Life at 77 Degrees F  Set Time at 77 Degrees F  Cure Time at 77 degrees F 
30 Minutes  4 Hours  3-5 Days 


  • Minimum Temperature of Curing: 60 degrees F
  • Mix Ratio Resin/Hardener: 2:1
  • Use with System Three General Purpose Resin



Use protective gloves when working with this product. Use soap and water or white vinegar to get it off of your hands. Use Denatured Alcohol to clean off your tools.

BRAND: System Three
Material: Epoxy
Rate Of Cure: Medium
Type: Hardener
5 1


by PowerReviews
System Three Medium Hardener

(based on 1 review)

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Reviewed by 1 customer

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Systems Three is great

By ronwiltx

from Kingsville, TX

About Me Advanced

Verified Buyer


  • Easy to Use
  • Protects Well


    Best Uses

    • Indoor

    Comments about System Three Medium Hardener:

    I use Systems Three, with black coloring, to fill wind splits and worm holes in Mesquite. It penetrates quite well and stabilizes some really gnarly wood. The real trick to using Systems Three is to mix it well. I mix for about a minute in a half and then pour it on. After about 5 minutes spray it with a light coat of "bubble eater" and it will give a perfectly clear appearance

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