Synthetic Clay 1 lb Reuseable synthetic modeling clay that never dries out and never hardens. Great for sealing mold boxes and claying up originals when making 2 piece molds. Alumilite Synthetic Clay is used for creating one time original patterns, sealing mold boxes, and for claying up two part molds. It will never dry out and can be reused over and over again. It does not contain sulfur and will not inhibit platinum based silicone rubbers. Alumilite Clay ALU40000Regular Price: $2.75Sale Price: 32 YEARS OF GREAT LOW HOBBY PRICES If You Have Questions, Please Call Toll Free, 1-800-225-6509 Ask for Doug or Wendy