Description
4223 is a one-part, fast drying, thermoplastic polyurethane conformal coating. It cures to a durable,
flexible, scratch resistant and smooth finish. It is easy to apply and can be handled in 15 minutes. It may
be removed with appropriate strippers, or soldered through for repair or rework.
4223 protects printed circuit boards in extremely corrosive environments. It protects against moisture,
fungus, dirt, dust, thermal shock, abrasion, short circuit, high-voltage arcing, and static discharge.

Features and Benefits
• Meets UL 746E conformal coating specifications for indoor use at 2 mil thickness on a 0.8 mm FR-4
laminate
• Meets UL 94V-1 flammability rating
• Fluoresces under UV-A light (blacklight)
• Isocyanate-free