TOP SEALING PTFE Asbestos Gland Packing PA103 is made of white and higest quality asbestos fiber packing impregnated with PTFE dispersion. (addition of lubricant is optional.) Asbestos PTFE packing is soft in texture and suitalbe as the sealing of pumps for liquidated chemical, However asbestos packing impregnated with lubricants is recommended for use with reciprocating pumps or for the sealing in places where linear velocity is up to 10 m/s.