Precursors, insulative compositions, an article including the insulative compositions and a method for making the insulative compositions are disclosed. The insulative compositions are formed from a precursor composition that includes a nitride butadiene rubber, a nanoclay and a cure package including a sulfur-based curing agent. The insulative compositions may have a substantially reduced weight and compressive modulus in comparison to conventional insulative rubbers. Thus, the insulative compositions may provide improved ballistic properties in addition to reduced density and thickness. Precursor compositions for forming the insulative composition may have good flow characteristics. The insulative compositions may be used in a variety of applications, such as personnel body armor, ground vehicle armor and aircraft armor systems.