Oil Based Clay

Oil based clay is clay mixed with some kind of oil or combinations of oil. It will not dry out, but it will oxidize over time and become difficult to work (about thirty years). Sometimes you can manipulate the consistency of the clay by mixing it with petroleum jelly, but this is hard work. Some oil based clays like plastina contain sulfur and can't be used with silicone molding compounds. Plastina can be sealed with a coating of sealer or shellac but any coating of this type will take away some of the character of the clay. We recommend and use an industrial tooling clay which is easy to work and won't react with silicones. Some oil based clays can be melted and poured into a mold. Preheating oil based clay will soften it and make it easy to work.

Klean clay has gone the way of the Earth. The old gentleman who made it used up the last of his chemicals and retired. He did, however, sell his formulas and equipment to a competitor, who has taken up the cause. The replacement clay is as follows:

(ASTM Certified)

This is a sulfur free clay, perfect for direct contact with tin cure silicone mold making compound. It comes in one color which cream. It comes in one hardness which is regular. We call it student clay because each pound of clay is wrapped.

Now available in 1 lb. bars.

45 lb. box.

We have returned to one of our old staples. Industrial Tooling clay. It comes in a 45 lb. box, in one large slab. Natural in color (cream) regular firmness. This is a great way to get a lot of clay at a reasonable price.

Sulfur free. Can be melted to a liquid and poured into a mold including alginate. Unless you specify otherwise, a neutral color such as flesh, tan, grey or the like will be shipped. Very soft. [Color Code]

Modeling clay can be melted and poured into an alginate mold.

4.5 lb., 2kg brick.

1 lb., 454g bar.

Check out our Water Based Clay