Chavant FILL-IT is a sulfur-free non drying, multi-use clay. FILL-IT is useful for filling cracks, sealing mold boxes, creating dams or parting lines, and much more. FILL-IT is a wax- based with excellent adhesive and feathering characteristics. FILL-IT HM is available for warmer environments, the HM formula will not get as sticky at higher temperatures. Chavant FILL-IT is available in a 1 lb. package (consisting of 4 sticks of clay), approx. 4.5 in. x 3.75 in. x 1.25 in.