Equalseal EQ 504 is a true re-structured PTFE gasket sheet with excellent physical properties to be used in the most demanding applications. Its unique construction which includes premium ptfe resin and glass microspheres limits the cold flow problems associated with skived PTFE sheets. Equalseal EQ 504 is more compressable than styles of re-structered PTFE and is effective in applications where bolt load is limited by equipment design. Equalseal EQ 504 is not recommended for sealing against light gases.