High-quality Laser SLA 3D printer resins and 3D printer photopolymers available for a variety of stereolithography 3d printers, including high-temperature resins, castable resins, and flexible resins. What is SLA Laser 3D Printing? SLA 3D Printing uses a laser that focuses on a vat of resin and photopolymers. The laser follows a 3D design or model and cures the resin point-by-point to create the design. SLA 3D printing is popular for projects/industries that require highly-detailed 3D printed parts.