Cosclay Softening Agent makes dry, uncured Cosclay more pliable. This concentrated dilutant is easy to use blend one teaspoon with dry Cosclay in a food processor until incorporated. Remove the product from the processor and allow it to sit for 10 minutes, which allows the softening agent to absorb. Knead the clay to the proper texture and leave it for 24 hours, so tackiness has time to dissipate. Cosclay Softening Agent can also be used to smooth rough Cosclay surfaces. - Cosclay Softening Agent.