poly(p-xylylene)

polymer

Poly(p-xylylene), commonly known by its trade name Parylene, is a linear aromatic polymer synthesized through vapor-phase polymerization of p-xylylene dimers. It forms ultra-thin, pinhole-free conformal coatings with exceptional chemical resistance and dielectric properties, making it distinct from solvent-based polymer coatings. The material is widely used in electronics, medical devices, and precision instruments where moisture barriers and electrical insulation are critical; engineers choose it over conventional polymers because its vacuum-deposition process enables uniform coating of complex geometries without solvents, heat damage, or line-of-sight limitations.

conformal electronics coatingsmedical device encapsulationmoisture barriers for PCBsimplantable device protectionhermetic sealing for sensorshigh-reliability aerospace connectors

Compliance & Regulations

?UL 94?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Glass Transition Temperature(Tg)	508.2	K	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Safety & Biocompatibility

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

poly(p-xylylene)

Thermal Properties

Regulatory Screening

Environmental

Safety & Biocompatibility