HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 17, 2011, 12:55 AM
Brett
bjaffee's Avatar
So Cal
Joined Apr 2002
5,285 Posts
Question
Is old epoxy okay to use?

Got some 20 minute Finish Cure that's been sitting around for a long while. The hardener has turned a VERY dark yellowish brown. I've got a test batch setting up right now...assuming it cures okay, is it okay to use? I just want to make sure it doesn't set up more brittle when it gets old.

Thanks!

PS...I'm using it to glass the center section of a wing.
bjaffee is online now Find More Posts by bjaffee
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 17, 2011, 09:49 AM
No fuse too fat
slopeiron's Avatar
USA, CA, Redondo Beach
Joined Apr 2002
3,874 Posts
I'd say if it kicks your good to go. The West Systems hardener turns dark over time too. But it still works just fine. Just makes brown parts.
slopeiron is offline Find More Posts by slopeiron
Reply With Quote
Old Sep 17, 2011, 10:29 AM
3D Toy Designer
MicroRotors's Avatar
USA, CA, Hesperia
Joined May 2001
4,451 Posts
Your test will tell. Sometimes old epoxy doesn't cure and it stays gummy or tacky even though it has set up to a firm state.

My thoughts, ... if in doubt and it's a small quantity, ... replace it, ... if it's a gallon, ... pray.
MicroRotors is offline Find More Posts by MicroRotors
RCG Plus Member
Old Sep 17, 2011, 03:44 PM
Slopeaholic
jimbo320's Avatar
Joined May 2011
3,596 Posts
Good quality epoxy has good shelf life. Just test it and see. If it's good quality will be ok.
jimbo320 is offline Find More Posts by jimbo320
Reply With Quote
Old Sep 17, 2011, 04:01 PM
Brett
bjaffee's Avatar
So Cal
Joined Apr 2002
5,285 Posts
Thanks guys. My test batch was rock solid by morning today, so I glassed the bottom of the wing root. So far, so good.
bjaffee is online now Find More Posts by bjaffee
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion reassemble stator...Do I use epoxy rcalldaylong Power Systems 5 Aug 23, 2011 08:58 AM
Discussion Okay to use a tranformer to balancer? alibongo Beginner Training Area (Aircraft-Electric) 7 Jul 21, 2011 10:14 PM
Question New?? Old trans okay for Brushless? Collectability to a possibly old Traxxas Bandit?? planebldr Off-road Cars 7 Jan 28, 2010 12:19 AM
4 year old batteries okay? SC3 Sailplane Talk 11 Sep 27, 2005 12:31 PM
When to use CA and when to use Epoxy waltj2k The Builders Workshop 3 Sep 20, 2005 05:21 AM