Gak is notorious for bonding permanently to fabrics. Keep it far away from carpets, rugs, and clothing. If it dries into fabric, it is incredibly difficult to remove.

In a separate cup, dissolve into 1/2 cup of warm water .

Because Gak has been released in several different waves over the decades, your buying strategy will change depending on what you are looking for: 1. Modern Reissues (Best for actual play)

Mix and 1 cup of water in a bowl. Add a few drops of food coloring.