Stretchable electronics are being used in various applications, such as wearable electronics, stretchable artificial skin, and other devices, for health monitoring and smart textiles due to their excellent mechanical conformability. While most current processes use commercially available substrates for printed applications, their ability to stretch and have tailorable dielectric constants is limited. This work describes the creation of elastomeric substrates with enhanced/tailorable dielectric properties for stretchable electronics. The addition of a dielectric filler enables tailored dielectric properties, but there are often difficulties in maintaining desirable mechanical properties including recovery after stretch and low set. This work shows the creation of a thin stretchable dielectric substrate with a ferroelectric filler, barium strontium titanate (BST), in a base elastomer, butyl rubber (IIR). The effect of BST loading on properties, such as dielectric and mechanical strength was evaluated. A stretchable conductive ink was selected for printing a design for dielectric property measurements. The resultant material offers good potential for stretchable electronics applications