Compared to liquid processes, the effects of gravity and surface tension are negligible, so there is no bridging, thin-out, pinholes, puddling, run-off or sagging. The process takes place at room temperature so there is no thermal or mechanical stress on the product. Parylene is physically stable and chemically inert within its usable temperature range. It provides excellent protection from moisture, salt spray, corrosive vapors, solvents, airborne contaminants and other hostile environments. Parylene provides coatings with a friction coefficient as low as 0.25 to 0.30.
These coatings are formed by the polymerization of para-xylene, which is deposited on the substrate through vacuum deposition. Thus the coating is uniform, thin, stress free and has very good mechanical properties. The coating is applicable for substrates where protection is more important than decoration.