Need Help: Smoothon Epsilon Hardening Like A Rock



Ive gone thru several mixes of Epsilon for my EVA suit and ive run into something very strange.
after only 9 minutes after being mixed, the material coagulated into this super hot, super hard clump, wasting a depressing amount of Epsilon. Its the first time this has happened, and it happened to be the first time i tested paper cups (like dixie cups) and i think thats why, but im not sure. I think i probably didnt mix enough, as in hindsight, i rushed it, so thats my best guess, but you guys know more about it than me :D
thx, and once i figure this problem out ill delete this thread right away :)