Epoxy Shelf Life - West Systems

Epoxy Shelf Life - West Systems

Post by Mulle » Sun, 30 Dec 2001 11:02:20



I have some 105&205 West system epoxy that has been in my garage for a year
or so. The cans have had pumps on them the entire time and are currently
about 50% full. The 205 hardener seems to be quite a bit darker than I
remember but I'm not really sure about that. I'm in NC so my garage gets
down to ~35f in the winter and sometimes close to 100f in the summer. Does
anyone know if this epoxy is still OK or should I just head out and get me
some new cans?

Thanks,
Todd

 
 
 

Epoxy Shelf Life - West Systems

Post by Bob Kapl » Sun, 30 Dec 2001 23:18:42



Quote:
> I have some 105&205 West system epoxy that has been in my garage for a year
> or so. The cans have had pumps on them the entire time and are currently
> about 50% full. The 205 hardener seems to be quite a bit darker than I
> remember but I'm not really sure about that. I'm in NC so my garage gets
> down to ~35f in the winter and sometimes close to 100f in the summer. Does
> anyone know if this epoxy is still OK or should I just head out and get me
> some new cans?

Read the storage information and follow it. While cold may thicken and
crystalize the epoxy, I believe that prolonged storage in excessively warm
areas is a bigger problem.

Why don't you mix up a test batch and test what you've got and see f it
still works.

        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

Kaplow Klips & Baffle:      http://www.nira.chicago.il.us/Leading_Edge/MayJun00.pdf
NIRA:   http://www.nira.chicago.il.us  NAR:    http://www.nar.org

        We must have faith in our democratic system and our Constitution,
        and in our ability to protect at the same time both the freedom and
        the security of all Americans.

        26-October, 2001: A day that will live in infamy
        Support Freedom: http://www.indefenseoffreedom.org/

 
 
 

Epoxy Shelf Life - West Systems

Post by cha » Mon, 31 Dec 2001 02:16:33


You should be fine.  West has a pretty long shelf life.  I both sell
and use the stuff.  I have a can of 207 that has been used off and on
with the pump in it the entire time for 3-4 years and it's fine.  I
wouldn't worry too much about it unless it gets like 10+ years or more
and even then it may still be fine.  Also, West has a GREAT user guide
for their system that tells even more about the stuff and best of all
it's free.

chad

Quote:


> > I have some 105&205 West system epoxy that has been in my garage for a year
> > or so. The cans have had pumps on them the entire time and are currently
> > about 50% full. The 205 hardener seems to be quite a bit darker than I
> > remember but I'm not really sure about that. I'm in NC so my garage gets
> > down to ~35f in the winter and sometimes close to 100f in the summer. Does
> > anyone know if this epoxy is still OK or should I just head out and get me
> > some new cans?

> Read the storage information and follow it. While cold may thicken and
> crystalize the epoxy, I believe that prolonged storage in excessively warm
> areas is a bigger problem.

> Why don't you mix up a test batch and test what you've got and see f it
> still works.

>    Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

> Kaplow Klips & Baffle: http://www.nira.chicago.il.us/Leading_Edge/MayJun00.pdf
> NIRA:      http://www.nira.chicago.il.us  NAR:    http://www.nar.org

>         We must have faith in our democratic system and our Constitution,
>         and in our ability to protect at the same time both the freedom and
>         the security of all Americans.

>    26-October, 2001: A day that will live in infamy
>    Support Freedom: http://www.indefenseoffreedom.org/

 
 
 

Epoxy Shelf Life - West Systems

Post by Ajna Cackovi » Mon, 31 Dec 2001 03:57:40


the response I got from West System when I asked them that very question
was:

"Shelf life is nothing you have to worry about until the resin and hardener
are 4 or 5 years old."
--Ajna Cackovic, NSPE


Quote:
> I have some 105&205 West system epoxy that has been in my garage for a
year
> or so. The cans have had pumps on them the entire time and are currently
> about 50% full. The 205 hardener seems to be quite a bit darker than I
> remember but I'm not really sure about that. I'm in NC so my garage gets
> down to ~35f in the winter and sometimes close to 100f in the summer. Does
> anyone know if this epoxy is still OK or should I just head out and get me
> some new cans?

> Thanks,
> Todd

 
 
 

Epoxy Shelf Life - West Systems

Post by Bob Chmar » Mon, 31 Dec 2001 13:11:44


Todd:

My 205 has turned a dark amber color but I've never had a problem.  It still
seems to cure as well as it did when it was new.

--
Bob Chmara
www.chmara.com/bt/rocketry

| I have some 105&205 West system epoxy that has been in my garage for a
year
| or so. The cans have had pumps on them the entire time and are currently
| about 50% full. The 205 hardener seems to be quite a bit darker
<snip>

 
 
 

Epoxy Shelf Life - West Systems

Post by Mulle » Mon, 31 Dec 2001 21:18:52


Thanks,  I went and read the can and it even states that it will probably
darken with age - should have done that first.
Todd

Quote:
> Todd:

> My 205 has turned a dark amber color but I've never had a problem.  It
still
> seems to cure as well as it did when it was new.

> --
> Bob Chmara
> www.chmara.com/bt/rocketry


> | I have some 105&205 West system epoxy that has been in my garage for a
> year
> | or so. The cans have had pumps on them the entire time and are currently
> | about 50% full. The 205 hardener seems to be quite a bit darker
> <snip>

 
 
 

Epoxy Shelf Life - West Systems

Post by JDcluste » Tue, 01 Jan 2002 09:01:24


Yeah , I've noticed that as well .
It doesn't seem to happen with the longer cure 206 hardener though .

JD


Quote:
> Todd:

> My 205 has turned a dark amber color but I've never had a problem.  It
still
> seems to cure as well as it did when it was new.

> --
> Bob Chmara
> www.chmara.com/bt/rocketry


> | I have some 105&205 West system epoxy that has been in my garage for a
> year
> | or so. The cans have had pumps on them the entire time and are currently
> | about 50% full. The 205 hardener seems to be quite a bit darker
> <snip>

 
 
 

Epoxy Shelf Life - West Systems

Post by ....E » Tue, 01 Jan 2002 12:22:23


I have West System resin and hardener that are over four years old. They
still work fine. The hardener will turn dark if exposed to light, but
doesn't effect it's usefulness. One tip, if using with pumps, is to punch a
nail thru the top edge of the cans. This helps ease the pump pressure.
Regs,
....Ed
http://www.FoundCollection.com/***iaHPR.org


Quote:
> Todd:

> My 205 has turned a dark amber color but I've never had a problem.  It
still
> seems to cure as well as it did when it was new.

> --
> Bob Chmara
> www.chmara.com/bt/rocketry


> | I have some 105&205 West system epoxy that has been in my garage for a
> year
> | or so. The cans have had pumps on them the entire time and are currently
> | about 50% full. The 205 hardener seems to be quite a bit darker
> <snip>

 
 
 

Epoxy Shelf Life - West Systems

Post by David Theden » Fri, 04 Jan 2002 01:38:02


I have noticed that the 105 hardener will turn amber (or darker) in color
after exposure to cold overtime.  Does not appear to happen as fast with the
slower 106 hardener.  But it still hardens up just fine.  I have to use both
since the temperature can be in the 100's in summer and 30's in winter here
in Idaho.  And the garage is not heated.

dave


Quote:
> I have some 105&205 West system epoxy that has been in my garage for a
year
> or so. The cans have had pumps on them the entire time and are currently
> about 50% full. The 205 hardener seems to be quite a bit darker than I
> remember but I'm not really sure about that. I'm in NC so my garage gets
> down to ~35f in the winter and sometimes close to 100f in the summer. Does
> anyone know if this epoxy is still OK or should I just head out and get me
> some new cans?

> Thanks,
> Todd

 
 
 

Epoxy Shelf Life - West Systems

Post by The Silent Observe » Fri, 04 Jan 2002 12:30:29


Quote:

> I have noticed that the 105 hardener will turn amber (or darker) in color
> after exposure to cold overtime.  Does not appear to happen as fast with the
> slower 106 hardener.  But it still hardens up just fine.  I have to use both
> since the temperature can be in the 100's in summer and 30's in winter here
> in Idaho.  And the garage is not heated.

You must be in the tropical part of Idaho.  Where I grew up, in and near
Moscow, we used to routinely get below zero Fahrenheit for a couple
weeks every winter, and it wasn't uncommon to get as cold as twenty
below at least once in a winter (and then I recall the winter of
1968-69, when it hit fifty below and stayed there for two days -- froze
nearly every radiator in the county, and cracked a number of engine
blocks, including ours).

And yes, it'd still get over 100 several days to a couple weeks every
August...

--
This space temporarily vacant.  Look for more wit and wisdom in the
next iteration.

Donald Qualls, aka The Silent Observer           NAR # 70141-SR Insured
Rocket Pages                http://silent1.home.netcom.com/launches.htm
Telescope Pages            http://silent1.home.netcom.com/astronomy.htm
Lathe Pages           http://silent1.home.netcom.com/HomebuiltLathe.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.