Puretecs Purocoat 17/02

Ultra-thin fluoropolymer protective coating for electronics and printed circuit boards

Purocoat 17/02 is an ultra-thin, transparent fluoropolymer coating designed for the professional protection of electronic assemblies. This ready-to-use liquid is based on a high-performance fluoroacrylate polymer dissolved in Purosolve 71/00 (hydrofluoroether).

At a solid concentration of 2% (Purocoat 17/02) fluoropolymer content, the coating typically produces a layer thickness of 500 nm. The extremely low surface energy (8–12 mN/m) ensures that water, heptane, toluene, lubricating oils, and silicones reliably bead off.

Sensitive electronics are thus protected against:

• Moisture
• Corrosion
• Surface diffusion
• Chemical influences
• Contaminants and oils

The coating is electrically non-conductive, permanently flexible, and completely transparent—ideal for printed circuit boards, sensors, LED modules, and precision mechanical assemblies.

Application

Application is performed via a dip coating process with a coating duration of just a few seconds. After removal from the bath, a homogeneous, ultra-thin protective film remains on the assembly. The assemblies are immediately ready for use and electrically functional after drying and are therefore suitable for mass production.

PCBA - Fluoropolymer coating

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The film thickness is primarily controlled by the solid content.

For concentration adjustment:

• Increasing the concentration: Purocoat 17/10 (10% fluoropolymer)
• Reducing the concentration: Purosolve 71/00
• Removing the coating: Purosolve 71/00

Puretecs offers suitable measurement and calculation tools for monitoring the solid concentration in the bath.

 Intructions to determine the solid concentration by weighing method >>

 Calculation tool to determine the solid concentration >>

System Solution: Equipment & Process Reliability

Combining this with a Puretecs-recommended dip coating system — Basic V4, Prima V8, or Optima V6 — ensures:

• Dry removal of assemblies
• Recondensation and recycling of solvents
• Reproducible coating quality
• Sustainable process control

Advantages of Purocoat:

• Ultra-thin protective film (nanometer range)
• Contacting metallic contacts remains possible
• Test points remain accessible
• No masking required
• No change in optical properties (LED-compatible, no blue shift)
• Process-reliable in industrial use
• Fast drying within a few minutes

Technical Data

Differentiation & Product Complement

• Purocoat 17/10: Highly concentrated fluoropolymer (10%) for adjusting film thickness and concentration.
• Purosolve 71/00: Cleaning and diluting agent for concentration control and coating removal.
• Purocoat 17/02 UV: A variant of the coating material that forms a protective layer that fluoresces slightly under UV light.

Application Examples

• LED automotive lights
• Enclosed outdoor control units
• Control units in car washes
• Condensation protection
• Protection against outgassing from organic materials

Certifications:

• UL listed: as a protective coating under E541242

Important Notes

• Contains fluorine (PFAS material)
• Not suitable for invasive medical applications
• Not intended for private use

Are you looking for an ultra-thin, high-performance electronics coating that requires no masking?
Contact us now — we’ll provide personalized advice for your application and will be happy to send you a sample.