In the context of a scaffold intended for implantation, two of the most critical mechanical requirements are (i) its ability to withstand the pressure exerted by blood flow and (ii) to confine blood within the scaffold without experiencing severe leakage . As such, burst pressure and leakage properties emerge as paramount considerations in scaffold performance. The comparison of the tubular hierarchical structure with and without gelatin coating of the lumen, was intended to further understand the impact of gelatin on the burst pressure and leakage properties. This comparative analysis allowed us to assess the specific effects of gelatin on liquid leakage, providing valuable insights into the performance and integrity of the electrospun nanocomposite fibers under different conditions. The superior performance observed in the scaffolds with PEG after gelatin coating, can be attributed to the presence of 5% PEG in the copolymer composition, which creates a more hydrophilic surface compared to the hydrophobic nature of the PBS-DLS 70-30 scaffolds. This heightened hydrophilicity facilitates improved gelatin attachment to the scaffold's surface, thus enhancing the scaffold's sealing capabilities. In the context of cardiovascular clinical practice, several studies have aimed to develop scaffolds with burst pressure values equivalent to that of human saphenous veins and mammary artery, as gold standard in the field. Human saphenous veins and mammary artery possess burst pressure values exceeding 1680 mmHg (223 kPa) , . In our study, the burst pressure of the three-layered PBS-DLS-PEG scaffold, when coated with gelatin, approached this remarkable benchmark. Also, achieving zero leakage under dynamic conditions mimicking human blood pressure fluctuations (80 to 120 mmHg) is showing the potential of coating the lumen to close the pores.