Additive manufacturing (AM) of elastomers enables the fabrication of many technologically important structures and devices, such as soft robots , tissue scaffolds , stretchable electronics , sensors , actuators , and dissipative structures . Among various kinds of methods, stereolithography (SLA) printing represents one of the most used additive manufacturing techniques, largely because of its capability in fabricating complex three-dimensional (3D) structures with relatively high resolution and smooth finishes . However, the feedstock polymeric resins are limited by the nature of SLA printing. In SLA printing, a thin layer of liquid photopolymer is selectively solidified by light-activated polymerization. After the layer is cured, the build platform moves vertically, exposing the cured layer to a new layer of liquid resin. This process requires the resin to be of relatively low viscosity, so that the resin can easily flow to replenish the space between the printed part and the light source. As a result, the materials suitable for SLA printing are limited to a few photocurable, low viscosity polymeric resins .