Picking up where Matt left off, I am still wondering if there are any other factors going on here? 

Your mixing ratio seems ok.  Amine blush is typically caused  by factors such as temperature, poor mixing, slight measuring error etc so maybe tighten up on your processes slightly will help with that.

Can you email or message me the batch?  We get the hardeners in  large  barrels  and IBC's for the resin so batch sizes are quite large.  We have not had any reports of the flakes you have mentioned.

Have the containers been properly sealed?  I have seen white crystalline flakes around poorly shut lids and/or drips around the neck/lid where the hardener  which is exposed to air has had moisture get at it.   It is remotely possible if your environment is very moist you could have the issue in a bottle with the lid left off.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

that can only mean all batches are not the same...

I use the fast hardener fairly regularly, and not in the best environmental conditions (old barn). I have had no issues, either on its own or mixed with the slow hardener.
Are you using Easycomposites hardeners and are they newish? If not kept in a completely sealed container resin hardeners can deteriorate quickly when exposed to air.

After 2 weeks of testing and many many hours of labour, I have concluded that the fast hardner of the resin is defective. It has caused me to rebuilt from scratch 2 very large components, because it was delaminating between the multiple layers applied when sanding. The slow hardner seems to be working though far from perfect, if your enviromental conditions are spot on, but the fast hardner simply is to be avoided with all costs.

indeed could be, but i have them excluded as in the space I work with resin the temp and humidity are controled.

Where do you live?

Also, I encounter another problem with the resin, so I will post it on this same topic. In combination with the fast hardner, the resin cures rock solid but with a form of amine blush. The surface remains sticky to the touch after curing, which won t be an issue on the surface layer because it can be easily washed with water i noticed, but sanding the component heavy delamination between layers occurs, which requiers the component to be thrown away...
I have made a test: in a closed working area with 45% humidity and 23 degrees temp I laminated 3 CF components. 1 with 50/50 fast and slow, 1 with slow and 1 with fast hardner.
The 2 components containing fast hardner cured with a very sticky finish and a surface imperfection, and the one with slow hardner cured perfectly.
I am running out of options,  I don t see what is causing all this issues and I honestly don t believe EL2 is a bad resin, as it didn t get bad feedback from other users.

Hello and thank you very much for your reply.
I can confirm all the above questions. I keep all my working conditions pretty strict, temperature 23, humidity 45, as this is not a hobby project, it is my occupation. It is just the first time I am using this product.  This resin was purchased last week(the 5kg pack with combined hardners), and I did understand the way it is supposed to be mixed, which by the way, i find it genious and helpful that you can control your pot life, according to your surfaces you laminate.
The mix i was using in my case was 40(20+20 slow and fast) hardner + 133 resin, but i have tried others just to see if there is any difference. The flakes that form are pretty solid, an can be picked up after brushing the resin from the flat surface, I will try to make some photos later if i m making a new mix, but to give an ideea, they look like very small pieces of paper soaked in resin. 
Thank you once again for your help.