What are conformal coating masking boots?

Nexus Image 1Masking boots are formed shapes used to cover components before conformal coating.

They are made to replace tape and dots in the conformal coating masking process for both Parylene and liquid conformal coating processes.

Using masking boots in protecting printed circuit boards (PCBs) from conformal coating application errors can be a lower cost, more reliable solution to using tapes.

The use of masking tapes, dots and liquid latex can be an effective process in protecting components from ingress of conformal coating.

However, the masking can be labour intensive, difficult and time consuming.

Masking boots can offer a labour saving alternative in both the masking and de-masking stages of the coating process. This saves time and money.

Further if the boots are recyclable then the savings can be even higher.

Three reasons to use masking boots

  1. Masking time is normally reduced. Masking boots can be 4-5 times quicker than masking tape.
  2. De-masking time is reduced. Again it is normally much quicker to remove masking boots.
  3. Masking boots are much less likely to leak. So there is potentially less damage and rework of the circuit.

This means you could save a lot of money very quickly when switching to masking boots.

Nexus Image 2
Masking boots can offer a labour saving alternative in both the masking and de-masking stages of the coating process. This saves time and money.

 Need to find out more?

Click conformal coating masking for further information or contact us directly and we can help you.

If you are new to Nexus and our work on conformal coatings then a good place to go is our Start Here page or our free conformal coating eBook.

Three key facts you should know about conformal coating masking boots versus masking tapes

Three key facts you should know about conformal coating masking boots versus masking tapes

conformal-coating-masking-boot-versus-masking-tape

A conformal coating is an insulating material applied to circuit boards to protect them from the environment. However, the coating will generally damage components like connectors if allowed to get inside onto connections.

Conformal coating masking materials like tapes and boots can be used to prevent the coating penetrating into the components.

Masking tapes are wrapped around components to shield them.  Masking boots are placed over components such as connectors, plugs and sockets that require protection from the conformal coating applied. Both methods can protect both simple and complex parts and components.

Here are four key facts to consider when comparing masking tape and masking boots.

Faster – Masking boots are normally much quicker to apply and remove than masking tapes. It does depend on the complexity of the component to be masked but this correct in the majority of cases.

More reliable and simpler – Since the masking boot is a complete shield then there is less chance of the conformal coating leaking through a gap compared to masking tape. Tapes rely on an operator’s skill in applying them. Masking boots remove some of this risk and the process is much easier.

Lower process cost –Where there is a medium volume of circuit boards to be masked with repeat components then typically masking boots can provide an excellent return on investment.  The balance of masking boots purchased versus operator time saved will vary with labour cost but in most cases is very cost effective. However, in low volume the cost balance may not be effective.

Need to find out more?

If further information on these topics and the key question you can go to our free eBook by clicking conformal coating design now.

If you are new to Nexus and our work on conformal coatings then a good place to go is our Start Here page.


Dr Lee Hitchens, Author of Nexus

Dr Lee Hitchens, Author of Nexus website and ebook
Dr Lee Hitchens, Author of Nexus

Dr Lee Hitchens is the author of the Nexus conformal coating website and eBook.

Send me an email at lhitchens@nexus3c.com and let me know what you think?

Practical conformal coating masking videos from Nexus

Nexus have collated a range of masking videos covering different materials including masking tapes, dots, liquid latex and masking boots.

Techniques for masking circuit boards with components, connectors, test points, mounting holes and via’s have been developed by many different companies with years of experience.

This knowledge has been put together to help others new to the art of conformal coating masking.

Categories for masking include tape, dots, latex and masking boots.

To view the videos click Practical conformal coating masking videos now.