The spiral wound gasket is semi-metallic, comprising of a spirally wound v-shaped stainless steel strip and a non-metallic filler material, such as graphite or PTFE. Also on the gasket, is a solid outer ring used for centering and controlling compression.

Composed of a centering (outer) ring, a spiral wound sealing strip (filler) and an inner ring, Spiral Wound gaskets are created by winding alternating strips of metal and filler material suitable for the application media and pressure.