NanoProof 5.1 PCB Waterproofing Surface Treatment

Harmonization Code : 2901.10.00.00 |   Acyclic hydrocarbons; Saturated
Main features
  • Hydrophobic/Oleophobic treatment
  • 6-9 µm thickness
  • IPX7

Product Description

NanoProof 5.1 is a nanoscale surface treatment designed to impart hydrophobicity and oleophobicity to a wide variety of surfaces including most metals, semiconductors, and polymers. It is a simple, one-step process that creates moisture barriers on coated parts to repel water, oil, and other liquid organic materials. With a coating thickness of 6-9µm and an IPX7 Rating,  it is ideal for PCB waterproofing and imparting repellency to consumer electronics.


Advantages of Aculon's NanoProof 5.1

  • Can be applied through dip, spray, or dispense
  • IPX7
  • No cure required
  • Handleable when dry
  • Contains UV tracer
  • RoHS and REACH compliant

Utilization of multiple options
Please note that many customers have found significant success utilizing two or more of the available NanoProof® technologies successfully. Often times the most sensitive components benefit from the most robust NanoProof® technology (5.1) while the remaining components can be coated with the less robust coatings to benefit from their electrical push-through capability, flexible nature, and lower costs!



All NanoProof products contain a UV Tracer which is visible under 365nm wavelength UV light (Detectable by both the human eye and automated detection systems). Please note that soldermasks and other substrate materials containing a UV tracer may make accurate detection of NanoProof difficult.

Product Family
NanoProof 5.1-Series  

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Technical Specifications

General Properties
The color
Yellow-blue, clear
Film Thickness
Film Thickness
Film thickness is the thickness of a backing film without taking into account any coatings or adhesive layers. It is measured in micron and the conversion factor to mil is 0.039.
6-9 µm
Solids 20 %
Specific Gravity
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Shelf Life
Shelf Life
Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties.

It differs vastly per product and it is based on temperature and storage conditions.

The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ 15°C 24 months
Physical Properties
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
5 mPa.s
Electrical Properties
Visible Light Transmission 90 %
Thermal Properties
Boiling Point
Boiling Point
The amount of degree’s needed to reach in order to make the substance boil.
76 °C
Other Properties
Oil Contact Angle
Oil Contact Angle
The contact angle is the angle, conventionally measure trough the liquid, where a liquid-vapor interface meets a solid surface.
75 °
Water Contact Angle 118 °

Additional Information

How to apply NanoProof 5.1




Parts must be sufficiently clean before treatment for proper bonding and effective application. This can be accomplished by first degreasing the surface with solvents/rinsing with IPA.

Dip - Fully immerse the part in the treatment solution for 20 seconds. Withdraw the part at a steady rate to ensure even coverage. 


To dry, the part should be placed at room temperature for 2 hours.  For faster curing, additional thermal treatment at 60°C will speed solvent evaporation.



Spray - Spray the solution on the substrate, air dry. If the coating is too thick, reduce the amount applied by changing the settings on the spray gun or using a diluent.

Dispense - Dispense the treatment over the surface, applying enough to coat the entire surface. Allow excess material to drain.



Application Tips

  • Use a microfiber cloth to wipe after cleaning.
  • Coat the substrate as soon as possible after cleaning to prevent recontamination.
  • Spray Equipment Suggestion
    • Spray & Dispense Valve - The PVA FCS300 Valve has been tested and confirmed compatible with all NanoProof products.
    • Manual Coating System - The PVA MCCS-SYS-1 Manual Conformal Coating System has been tested and confirmed compatible with all NanoProof products.
    • Automated & Selective Coating - The PVA Delta 8 Selective Coating / Dispensing System has been tested and confirmed compatible with all NanoProof Products.
  • Cure temperatures and conditions should be optimized based on substrate and durability requirements.



How to test for Hydrophobicity

To test for hydrophobicity, allow water droplets to fall onto the surface, which should bead up to a contact angle >90⁰. If the contact angle is <90⁰, then the surface is not
hydrophobic. The surface should be cleaned again and the treatment reapplied.