MAS Fast Epoxy Hardener is a non-blushing room temperature rapid hardener for use with MAS Epoxy Resins.
It can also be used as an accelerator for the MAS Slow or Medium Hardeners when customized cure times are required. Applications for Fast include: bonding hardware, spot filling, and fairing. Additionally, the superior bonding strength of Fast formulas is ideal for high strength secondary bonding applications such as structural tabbing and repair of laminations. The rapid cure time of Fast allows overnight curing in low temperature conditions.
We do not recommend mixing more than 5 oz. of formula unless rapid application techniques are incorporated. An induction time of 1-2 minutes is recommended prior to application of formula. Always maintain a 2:1 ratio of resin:hardener.
Available in Pint, Quart, Half Gallon, Gallon, 4 Gallon, and 5 Gallon sizes.
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Viscosity at 77 degrees F: 250cp
Specific Gravity at 77 degrees F: 1.08
Flash Point (closed cup): 250 degrees F
Mix Ratio: 2:1 Resin to Hardener
Mixed Viscosity at 77 degrees F: 550-650 cps
Pot Life at 77 degrees F: 7 minutes
Thin Film Set Time at 77 degrees F: 2 hours
Full Cure: 2-5 Days
Peak Exotherm: 370 degrees F
Flexural Strength: 15,870 psi
Flexural Modulus: 355,000 psi
Tensile Strength: 6,7000 psi
Tensile Modulus: 390,000 psi
Use protective gloves when working with this product. Use soap and water or white vinegar to clean your hands. Use Denatured Alcohol to clean your tools.
Rate Of Cure:
will it cure at 60 Degres?
NO. AT LEAST 75 DEG F. GREAT PROD. EASY TO USE.DOES NOT BOND WELL IN COLDER TEMPS. MY OPINION.
Yes, I've built 5 boats in an unheated garage on Cape Cod in the winter. It just takes a little longer to set up and cure at the lower temps.
yes. i have used it as low as 50 degrees
Yes--the Fast hardener will cure at 60 degrees--not as fast as at higher temps but if you have cooler conditions the fast is the way to go (I built a rowing shell in a barn and basement which were seldom higher than 60). You can also mix in some fast hardener with the regular hardener if you want to speed things up a little. (actually the regular stuff will cure eventually at 60 or even 50 degrees--but it will take several days or more to cure solid).
I have used this product in colder temperatures but it's not ideal. Lower temperatures will require a couple days for the resin to fully cure. Even if you can put a space heater in the area it would be better than nothing. So, yes. But the warmer the better.
Yes, Mas Hardeners will cure at 60F. However, pot life and cure times will be extended noticeably at this lower temp. But don't get used to it. For as seasonal ambient rises,pot life will fall relative to the increase, as the mercury reaches the ideal 70-72F. And at the ideal, be prepared to work quickly, as pot life won't wait for you!
It'll cure at lower temperatures than that. Just takes longer.
Yes it cures fine in 60 degrees. I live in Seattle and did work outside with the temps between 55-60.
MAS Fast Epoxy Hardener
Have been refinishing/relaminating a 1969 dune buggy build from inferior resins and chopped fiberglass mat. The MAS epoxy products produce an excellent bond and are pretty easy to use. Issues with inconsistent "kick" times may be the result of my own errors with measuring, but I'm pretty careful...