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1. 05:36 PM - Re: Its so long since I bought Araldite /Epibond 420 (n7188u)
2. 07:10 PM - Re: Its so long since I bought Araldite /Epibond 420 (n7188u)
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| Subject: | Re: Its so long since I bought Araldite /Epibond 420 |
Daniel,
A couple of years ago I found out Aeropoxy supplies the adhesives used to manufacture
the Cirrus so I had a conversation with them since I wanted an alternative
to 420 (because the price was outrageous). They recommended one of their structural
toughened epoxies adhesives which is equivalent to that used to manufacture
the Cirrus. Equivalent because the PN of the stuff used in the Cirrus
comes in drums and the one I got you can buy a quart but same epoxy according
to them. I ended up using the 420 for critical structural stuff and the aeropoxy
for not so critical items. The stuff is great, easy to work with and I did
pull and impact test on our planes substrates and its tough stuff. Heck, if its
good for closing the wings in the Cirrus it should be ok for non ultra critical
stuff (actually in my opinion its as good as 420). It is much much less expensive
than 420.
I can get you the number once I get to my hangar. BTW, usual disclaimer: Im not
claiming its good for your application. Use at your own risk. But I like it and
you dont have to be Boeing to buy it :)
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495898#495898
Message 2
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| Subject: | Re: Its so long since I bought Araldite /Epibond 420 |
The Aeropoxy PN is ES6240.
One warning I make about this epoxy is that it is white and the hardener is clear
which means that when you mix it you really can't see if it got mixed properly
by it's color (or looks). I had no issues with this since I am very methodical
about measuring and mixing the epoxy. I always use a timer and mix for 3
minutes ensuring I scrape walls, bottom corners, etc. It always cured properly
so no issue with that but be warned that its color is a bit disconcerting.
It is a bit thicker than 420 but mixes well with flox.
I paid around $70 per quart kit a couple of years ago and bought directly from
PTM&W. As I mentioned, I was told by PTM&W this epoxy is equivalent to that used
in the Cirrus airplane for structural bonding.
Again, if you decide to use it please do so at your own risk but I found it to
be a good alternative for items such as the spar cups, bedding for bonding LG
frame to CM, phenolic guides, etc. I still used 420 for items such as fuselage
bonding, wing skin, stab bearings, tailpost, CM bonding, etc. Using the ES6240
for other not so critical areas allowed me to ensure I would have enough 420
for the critical ones since I had no intention of buying 420 for the price they
want for it these days.
Chris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495900#495900
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