If you looked close at the last pictures you would have noticed that the white goo was 60 grams but the last picture showed 69 grams of material instead of the 60 you would have expected.  But that picture had the stick in the cup because I had to stick it somewhere to take the picture. The tare weight was set to the weight of the container.

The stick weighs 3 grams so all is well. the mixture is an even gray with no white or black streaks when fully mixed.  I used the stick to load a syringe. I also made sticks with flat ends for applying sealant from the cup.