# MAS epoxy cure time with slow hardner at 60 degrees?

**URL:** <https://forum.clcboats.com/t/mas-epoxy-cure-time-with-slow-hardner-at-60-degrees/40481>\
**Category:** Builder's Forum\
**Created:** [January 7, 2013, 1:38pm UTC](https://forum.clcboats.com/t/mas-epoxy-cure-time-with-slow-hardner-at-60-degrees/40481 "2013-01-07T13:38:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Rob\_Carlon](https://avatars.discourse-cdn.com/v4/letter/r/71e660/32.png) [@Rob\_Carlon](https://forum.clcboats.com/u/Rob_Carlon)\
**Post date:** [January 7, 2013, 1:38pm UTC](https://forum.clcboats.com/t/mas-epoxy-cure-time-with-slow-hardner-at-60-degrees/40481/1 "2013-01-07T13:38:28Z")

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I bought an older&nbsp;new in the box&nbsp;kit and decided to test the epoxy that came with it before i starting&nbsp;my build.&nbsp; It seemed to&nbsp;harden fine where&nbsp;I coated a&nbsp;scrap of plywood but&nbsp;I tried to glue two pieces of scrap wood together and I was still able to pry them apart with a screwdriver even after 24 hours.&nbsp;&nbsp;&nbsp;My garage is unheated but the furnace is in there so it stays about&nbsp;60 degrees but may have gotten up to as much as 70 for a few hours during the day when the sun was shining in the windows.&nbsp; Should this stuff have been completely dured in 24 hours at this temp?

The guy i bought the kit from said it had been sitting in his garage for several years.&nbsp; Also the&nbsp; hardner is not clear like the Went System i previously used on&nbsp;my sailboat.&nbsp; It has a slight amber color&nbsp; in the pot but it is not noticeable on the plywood becasue I put some of&nbsp;my left over West System next to it and it looked the same

Is this stuff any good or should i just buy new epoxy?&nbsp;

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**Author:** ![David\_Gates1](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@David\_Gates1](https://forum.clcboats.com/u/David_Gates1)\
**Post date:** [January 7, 2013, 9:05pm UTC](https://forum.clcboats.com/t/mas-epoxy-cure-time-with-slow-hardner-at-60-degrees/40481/2 "2013-01-07T21:05:14Z")

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Sounds like old hardner. &nbsp;Fresh MAS is hard and strong in less than 24hrs in my shop which I keep at around 65 degrees.

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**Author:** ![Bill\_Huson](https://avatars.discourse-cdn.com/v4/letter/b/e9bcb4/32.png) [@Bill\_Huson](https://forum.clcboats.com/u/Bill_Huson)\
**Post date:** [January 8, 2013, 7:14pm UTC](https://forum.clcboats.com/t/mas-epoxy-cure-time-with-slow-hardner-at-60-degrees/40481/3 "2013-01-08T19:14:09Z")

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Sure you have the mix ratio correct? MAS is 2:1 - resin to hardener, whereas WEST is 5:1 for standard WEST hardener (205/206). WEST pumps are calibrated to put out 5 parts resin to 1 part 205 or 206 hardener, I'm not sure about MAS pumps. Get a digital postal or food scale and measure the squirts. The ratios are volume and hardener is slightly lighter than resin but on a small batch doubling the gram weight of hardener for the resin weight works fine.

i.e. 20 grams hardener = 60 gram total mix with resin.&nbsp;