Vat photopolymerization based additive manufacturing methods are one of the most widely used methods for production of the end use components in many fields, such as electronics, aerospace, biotechnology and the medical industry. While the printing process itself is highly digitally driven with high precision, the post-treatment of the vat polymerization methods is overlooked and handled manually. A reason for this is that the photopolymers used in this technology often do not include a detailed information on the post-treatment procedure and corresponding material characteristics, thereby introducing high variability to the manufactured product, depending on how the post-treatment is conducted. This study investigates the importance of the applied methodology for the post-treatment of the additively manufactured components in order for these to meet the necessary qualifications. The investigation of the influence of post-curing to the performance of photopolymer components was carried out by employing three post-curing schemes; thermal, ultraviolet (UV) flood light and simultaneous UV and thermal exposure. The material characterization was carried out with tensile test, dynamic mechanical analysis and thermogravimetry analysis. It was observed that the final mechanical performance is directly related to the applied post-curing method and the duration, while the thermal stability changes only slightly.