MoS₂ (molybdenum disulphide) filled PTFE is a modified Polytetrafluoroethylene composite in which small quantities of MoS₂ (typically 5–15%) are incorporated to improve hardness, stiffness and wear resistance. The addition of molybdenum disulphide has minimal effect on the chemical and electrical insulation characteristics of PTFE, making it ideal for high‑wear, high‑pressure seal applications where consistent friction and low‑maintenance performance are critical.

Novum MOF grades are further reinforced with glass fibers (15% or 25%, depending on grade) to reduce deformation under load and improve mechanical strength. Novum MOF is available in high‑performance, non‑free‑flow molding‑grade formats, suitable for compression‑molded joint seals, backup rings, valve seats and other critical sealing components.