NanoProof® 2.1

Aculon® NanoProof® 2.1 is a butylene polymer in hydrocarbon solvent, designed for extreme level protection. Read more about NanoProof® 2.1 to see if this product is the solution to your complex waterproofing challenges!

NanoProof® 2.1 Features

Water Contact Angle: 100°

Oil Contact Angle: 13°

Thickness: 25-100 µm thickness

PCB Immersion in Salt Water: >60 minutes

Forgiving?: Yes, NanoProof® 2.1 is more forgiving during application.

Includes UV Tracer?: Yes.

Cure Required?: No, NanoProof® does not require a cure.

ROHS & REACH compliant?: Yes.

Application Method: 

Dry Time: 



Abrasion Resistance

While Aculon® NanoProof® PCB Water Protection Treatment can be handled after treatment during assembly, it is not meant for long term abrasion exposure and durability that would be experienced by a permanently exposed PCB.

Temperature Resistance

Aculon® NanoProof® PCB Water Protection Treatment is stable to 250C before the chemical structure is damaged and performance impacted. There is no known lower temperature threshold which damages the treatment.

Chemical Compatibility

Organic Solvents

NanoProof® 2.1 is not compatible with petroleum based solvents, as they will be dissolved and removed. As such, petroleum based solvents can be used to remove these specific NanoProof® for rework.

NanoProof® 2.1 is not compatible with fluorosolvents. As such, fluorosolvents can be used to remove these specific NanoProof® for rework.

How To Apply NanoProof® 2.1

Step 1: Clean

Parts must be sufficiently clean prior to treatment for proper bonding and effective application. See “Cleaning” tab for more detail.

Step 2: Treat

Spray – preferred method for 2.1

Apply Aculon® NanoProof® PCB Water Protection Encapsulants via spray gun. Aculon® NanoProof® PCB Water Protection Treatment comes in 1L Bottles for spray applications. Spray application typically results in treatment thickness of 50 nm – 20 µm depending on process parameters and chemistry selected.

Recommended Equipment:


Dispense – optional method for 2.1

Dispense product over the surface. Apply enough material to coat the surface.


Dip – optional method for 2.1

Fully immerse the part in the Aculon® NanoProof® PCB Water Protection Treatment solution for 30 seconds. Withdraw the part at a steady rate to ensure even coverage. Allow to dry or cure depending on your substrate. Aculon® NanoProof® PCB Water Protection Treatments come in convenient 1L quantities for dipping applications.


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, 7.0, or 8.4) while the remaining components can be coated with the less robust treatments 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.


Removal Solvents for Rework

Aculon recommends the below solvents for removal of NanoProof® from your board should rework be necessary.
NanoProof® 2.1 :


Plastic Part Compatibility

Please refer to these general guidelines to determine if the NanoProof® product you are working with is compatible with your plastic parts that will come into NanoProof® in your manual or automated systems(tubing, pumps, gaskets, etc). Please note these are general guidelines for compatibility and it is recommended you test to confirm prior to implementation as Aculon® can not guarantee compatibility with your specific part.

NanoProof® 2.1

  • Compatible: PTFE, PET, Viton
  • Not Compatible: HDPE, LDPE, Polyurethane, PVC, Tygon, Noryl, ABS, PP, Polyphenol ethylene ether, silicone, neoprene, EPM, natural rubber


Masking Tape Compatibility

Please refer to these general guidelines to determine if the NanoProof® product you are working with to determine masking tapes that are compatible.

NanoProof® 2.1

Not Compatible: All known masking tapes and pastes. If you require masking, a mask that is not damaged by hydrocarbon solvents will be required. Aculon is not aware of a compatible mask at this time.

A properly cleaned and prepared surface is imperative for Aculon® NanoProof® PCB Water Protection Treatment to properly bond with the surface and offer desired performance. The level of cleanliness can play a role in performance and durability/lifetime of the treatment. Cleaning Methods can be summarized into Good, Better, & Best Options. The below cleaning options assume that the part to be treated has been sufficiently degreased and cleaned of all visual contaminants first.


  • Blow the part clean with oil free compressed air
  • Rinse with IPA or other appropriate cleaning solvent


  • Use an appropriate Kyzen cleaner


  • clean room construction and a combination of the above


Have a high volume or complicated process and are not sure what level of cleaning your parts require? Contact Aculon® and we will work with you to determine the level of cleanliness needed for your application and to determine a cleaning method that fits your process.


Do we have measured viscosity of this treatment?
ANSWER: For NanoProof® 2.0 it is very low, less than a centipoise, whereas with NanoProof® 7.0 and 8.4, viscosities are higher than 20 centipoise.

What is the application rate?
ANSWER: Typical application time is 30 seconds for dipping.  However, every part is unique-so your part may need some process optimization.  The withdrawal speed will also impact the thickness.  Spraying can be done in seconds.

You mention that NanoProof® 2.0 allows for electrical connections.  Is the treatment itself conductive?
ANSWER: The treatments are all non-conductive by nature.  They do allow for connections to be made through them by pushing out of the way or due to their ultra thin nature.  They will not impact the conductivity of a treated trace.  By design, our products are meant to keep conductivity from bridging.

When you make a push through connector, does it remain sealed?
ANSWER: Assuming that the treatment covers the bare metal lead – Yes.

Where does the product ship from?
ANSWER: The products are manufactured at our facility in California.  Orders from the United States market will ship from California.  We do have distributors in Europe and Asia who will carry and ship for orders in the area.

How much NanoProof® is needed for a certain size?
ANSWER: For all products: In general, approximately 1mL per square foot of surface area for dipping.  For example, a 3″x 5″ board would use less than a mL. Spray utilizes approximately 1-3mL per square foot of surface area.  Spray can be more efficient if not all surfaces need treatment.

Can a regular test tape be used to test for adhesion?
ANSWER: An adhesion tape test is not really relevant for NanoProof® 2.0 – it is actually still semi-liquid once it is down.