I had the same problem with MAS epoxy. A divorce, a layoff, and some other things caused my build to stall... and the resin congealed in the pump. You could order another set of pumps. But I just took some Dollar Tree pint plastic cups and marked them with the 2:1 ratio. I poured two ounces of water in one (using a Nyquill dose cup), marked the resin line, then poured another ounce in, and marked the hardener line (with the same red and blue that MAS uses to ID them). Then for larger pours, I did the same thing with four and two ounces of water respectively. I transferred the marks to three more cups for each size mix. Then I went smaller with little cups and 2:1 teaspoons for small jobs like glassing the foot peg studs in and deck hardware glueing. Works like a charm, and it's actually surer than the pumps.