Casein glue is a type of adhesive made from milk protein. The glue is known to be very strong over a long period of time and is highly resistant to water. It has a drying time that allows enough time for pieces to be positioned accurately.

Is casein supposed to be thick?

Casein protein has a much thicker consistency compared to any type of whey so it requires more water to be palatable. That said some casein protein powders taste great and are just as thin as other whey blends.

Why does casein protein clump?

Because casein is poorly soluble in water, its proteins build spherical structures called micelles that allow them to stay in suspension as if they were soluble. … Because the micelle holds the casein protein in suspension, without it the micelles will clump together and the casein comes out of the solution.