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Forum topic by doninvegas posted 08-22-2010 12:38 AM 1516 views 0 times favorited 20 replies Add to Favorites Watch
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doninvegas

334 posts in 2373 days


08-22-2010 12:38 AM

You Guys,
All the things I have read and watched about filling knots with epoxy is really good info. However, no one mentioned that the two parts generate heat. I was filling a knot today, I taped off the underside and when I saw some epoxy leaking through I flipped it over and went to wipe the glue off with my finger. It Burned Me.
Everyone be careful with this stuff.

-- "Courage is being scared to death -- but saddling up anyway."


20 replies so far

View Ger21's profile

Ger21

1047 posts in 2596 days


#1 posted 08-22-2010 12:46 AM

Either it was a really big knot, or it got hot in the mixing cup before you put it on the wood. Large quantities can get extremely hot, and can even be a fire hazard. Read the warning at the bottom of this page.
http://www.westsystem.com/ss/dispensing-mixing/

-- Gerry, http://www.thecncwoodworker.com/index.html http://www.jointcam.com

View Dennisgrosen's profile

Dennisgrosen

10850 posts in 2580 days


#2 posted 08-22-2010 12:57 AM

nearly all 1 and 2-componet things generate heat when they
dry up and harden everybody know it but they don´t think about it
nomatter how many times they see it

but thank´s for the reminder :-)

Dennis

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doninvegas

334 posts in 2373 days


#3 posted 08-22-2010 12:58 AM

It was a rather large knot and the package didn’t mention anything about heat. The piece is outside in the shade setting up.

-- "Courage is being scared to death -- but saddling up anyway."

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doninvegas

334 posts in 2373 days


#4 posted 08-22-2010 01:01 AM

BTW. I have done others with the same epoxy but they where much smaller. I didn’t have any problems with those. Just didn’t know. It’s great learning new things every day. It keeps me young.

-- "Courage is being scared to death -- but saddling up anyway."

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doninvegas

334 posts in 2373 days


#5 posted 08-22-2010 01:07 AM

Everybody?? Well I gussed I’m not in that crowed. It’s soooo cool learning new things. :)

-- "Courage is being scared to death -- but saddling up anyway."

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Dennisgrosen

10850 posts in 2580 days


#6 posted 08-22-2010 01:36 AM

havn´t you played around with DIY stoff and used plaster and concret
and plaster in school

View Tony_S's profile

Tony_S

606 posts in 2548 days


#7 posted 08-22-2010 03:49 AM

yep…..Ive never seen it catch fire it’s self….but I’ve seen it produce piles of smoke, melt containers, plastic rollers etc.
Typically, what we do if we mix up large quantities (1 or 2 cups), is mix the Epoxy, then pour it into small plastic ‘trays’ so it releases the heat generated more efficiently. If we have to mix really large quantities (1/2 gallon+) we actually pour it onto large cookie sheets to dissipate the heat generated.
Allowing the Epoxy to dissipate the heat efficiently seems to at least double the pot life as well.

http://westsystem.com/ss/other-epoxy-related-hazards/

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

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doninvegas

334 posts in 2373 days


#8 posted 08-22-2010 08:40 AM

Dennis, No. If I played with that stuff in school that was 50 years ago. Like I’m going to remember that.
Hay, I’m not bitching it was someting I just didn’t know. Like I said the package didn’t have any warning and I just watch videos and read posts and it was never talked about. I have used epoxy on small knots so I thought I’d try it it on a bigger knot. Sorry I even mentioned it. I’ll know better the next time.

-- "Courage is being scared to death -- but saddling up anyway."

View KayBee's profile

KayBee

1083 posts in 2712 days


#9 posted 08-22-2010 08:47 AM

Next time, get a can of your favorite cold beverage. Turn it over and use the bottom to mix your epoxy. When the epoxy is done, turn the can over and drink your it while the epoxy sets up! I don’t use epoxy much and seem to forget about how hot it gets about every third time.

-- Karen - a little bit of stupid goes a long way

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Tony_S

606 posts in 2548 days


#10 posted 08-22-2010 11:49 AM

“Sorry I even mentioned it”

Why?...

I think it’s a good thing you DID bring the subject up….There’s a lot of people on the forum who are a little bit smarter now than they were 11 hours ago….

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

View Dennis Fletcher's profile

Dennis Fletcher

467 posts in 2520 days


#11 posted 08-22-2010 01:40 PM

doninvegas,

Thanks for mentioning it. I never knew that it would generate heat, don’t use epoxy much, so thank you for giving me the info.

Don’t be sorry, you did good.

-- http://www.ahomespecialist.net, Making design and application one. †

View Dennisgrosen's profile

Dennisgrosen

10850 posts in 2580 days


#12 posted 08-22-2010 03:26 PM

sorry if you did take it the wrong way I didn´t ment to upset you it was
all said in a freindly tone :—)
and of course you wuold have forget it after so many years :-)
you proppely wasn´t have been told in those days

I have seen people forget theese things after 2 month

and ofcourse you shuold bring something like this up , it´s the small things that
makes the different and its always them people forget to tell the reader = us , about

even I wuold proppely have forgotten it next time I´m using a 2 component

and its the small things that makes or brake the day :-)

best thought´s
Dennis

View Lee Barker's profile

Lee Barker

2170 posts in 2316 days


#13 posted 08-23-2010 03:00 AM

The deeper the twopart stuff is, the more heat it generates. The boat and plane guys sometimes pour it out in an aluminum pie pan to slow the kick and reduce the heat generation.

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View Vicki's profile

Vicki

1043 posts in 2810 days


#14 posted 08-23-2010 05:55 AM

I didn’t know that about 2 part epoxy, so I too am glad to hear it. Sorry that you had to get hurt for me to know that.

-- Vicki on the Eastern Shore of MD

View Pete_Jud's profile

Pete_Jud

424 posts in 3218 days


#15 posted 08-23-2010 07:03 AM

I am one of those boat guys, and have put bakeing sheets lined with plastic over Ice beds to keep it cool when mixing up more than a couple of cups at a time. I used to buy West system epoxy in 5 gallon jugs, and If you mixed it to hot, WOW it could get hot and smoke, I never saw it start a fire, but think it could.

-- Life is to short to own an ugly boat.

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