Cart
Sign In
Rule of Thumb: Choose PCTFE when dimensional stability and low moisture absorption are critical (especially in cold environments). Choose PTFE when you need the lowest friction, broad chemical resistance, and high temperature capability for seals and non-stick surfaces.
PCTFE (Polychlorotrifluoroethylene)
PCTFE is a semi-crystalline fluoropolymer characterized by near-zero moisture absorption, high dimensional stability, and strong resistance to a broad range of chemicals, solvents, and oxidizing agents. Its relatively high stiffness compared to other fluoropolymers makes it well-suited for precision-machined components such as valve seats, seals, and electrical insulators. PCTFE performs reliably at cryogenic temperatures, making it a common choice in aerospace and industrial gas systems. It is preferred over PTFE when tight dimensional tolerances must be maintained over time or when moisture uptake would compromise part performance.
PTFE (Polytetrafluoroethylene)
PTFE is a fully fluorinated polymer offering one of the lowest coefficients of friction of any solid material, combined with broad chemical inertness and a continuous service temperature range from cryogenic conditions to approximately 260°C (500°F). It is widely specified for seals, gaskets, bearing pads, and chemical-resistant liners. Compared to PCTFE, PTFE has higher thermal expansion and lower stiffness, and is more susceptible to cold flow under sustained compressive load. PTFE is the preferred choice when friction reduction, non-stick performance, or resistance to nearly all industrial chemicals and solvents is the primary design requirement.
PCTFE Applications
- Seals, gaskets, and valve seats
- Cryogenic service components
- Pump parts, diaphragms, and impellers
- Chemical processing equipment
- Aerospace and nuclear service components
- Laboratory and precision instrumentation
PTFE Applications
- Seals, gaskets, and valve components
- Chemical-resistant tubing and piping liners
- Pump parts and fluid system manifolds
- Bearings and bushings (bearing-grade)
- Semiconductor processing equipment
- Scientific and laboratory equipment
PCTFE Common Brands
- Neoflon®, Kel-F®, Aclon®
| Characteristic | PCTFE | PTFE |
|---|---|---|
| Excellent chemical resistance | ||
| Broad service temperature range | ||
| Good electrical insulation | ||
| Near-zero moisture absorption | ||
| High stiffness and creep resistance | ||
| Low gas permeation and outgassing | ||
| Radiation resistance | ||
| Extremely low coefficient of friction | ||
| High continuous service temperature (to 500°F) | ||
| Soft and formable |