Static seals must meet increasingly stringent performance requirements due to environmental and economic factors, necessitating continuous advancements in their design and optimization. One type of a static seal is the spiral wound gasket (SWG), classified as a semi-metallic gasket. SWGs are widely used in high-pressure and high-temperature applications, ensuring reliable protection against fluid leakage in flange-bolt joints. The spiral wound gasket consists of an inner ring, an outer ring, and alternating plies of formed steel tape and soft filler. The selection of soft-material fillers in spiral wound gasket is influenced by the specific operating conditions. Significantly, a spiral wound gasket with soft, low-compressibility filler material faces the greatest difficulty in meeting leakage requirements at low clamping forces. This study examines the influence of geometric parameters of the steel and soft filler tape – such as thickness, width, and the cross-sectional shape of windings – on sealing performance, stress distribution, and mechanical strength. The findings support the optimization of gasket designs, enhancing their reliability and operational efficiency in critical industrial applications. The experimental results are discussed, emphasizing the impact of geometric variations on the gasket’s ability to prevent fluid leakage and withstand operational stresses. A comprehensive comparative analysis is presented, focusing on the sealing and mechanical properties of spiral wound gaskets with different steel tape geometries.