MAS Medium Hardener is a polyamine blend intended for moderate reactivity and resistance to amine blushing. This hardener should be used when the ability to sand overnight is more important than continuous laminating and open time provided by MAS Slow Hardener. It will provide a beautifully smooth, void-free finish with great resistance to milking-out during application and fogging in critical clear coating applications. Mixed with thickeners, the mixture gels and sets quickly enough to avoid draining and sagging, while still allowing ample flow time for controlled application periods.
• Moderate pot life, gel and thin film set times provide advantages when filleting and fairing
• Blendable with fast or slow hardeners to customize cure time
• Storage life: a minimum of 12 months in a sealed container
• Always maintain a 2:1 ratio of resin to hardener