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Spray Silicone Sealer: Your Right Choice for Electronics Application

Electronics systems use Spray Silicone Sealer to protect against moisture, heat, and UV light. In this article, we will help you choose the right type of spray silicone sealer for your electronics application.

What Is Spray Silicone Sealant

Silicone is a type of adhesive found in liquid, resin, grease, paste, or rubber form. Most users dispense silicone from a tube or brush it onto a surface. However, some applications need a consistent, thin layer of silicone and high levels of flexibility. 

In some electronic applications, the circuit boards or cable harnesses are flexible. While in others, the areas to protect are difficult to access. Hence, these applications use spray silicone sealer dispensed as a fine spray from a pressurized spray can.

 Spray Silicone Sealant Common uses

Spray Silicone Sealant

You will find spray silicone sealers in industrial applications and construction. Some common uses for silicone sealer spray include: 

  • Marine and automotive applications to prevent rust
  • Aerospace systems as a sealant
  • A sealant for electronic circuit boards, connectors, sensors, and components
  • Protection for cable runs. 
  • Lens mold in LED applications
  • A lubricant in metal to non-metal interfaces
  • Protecting and repairing rubber gaskets. 

How To Pik The Best Silicone Sealer Spray

Silicone Sealer Spray

Factors to consider when choosing the best spray silicone sealer are:

Resistance

What is important in your application? Is it moisture resistance, heat resistance, or UV light resistance? Choose a silicone spray sealer that matches your requirements. 

Flexibility

Are silicone flexibility and stretch important? If so, you should choose a silicone with a low modulus.

In-Service Life

If you need the silicone coating to protect over the long term, it is generally best to choose a low modulus silicone. 

Adhesion

The type of silicone should match the electronics board, components, or connectors you intend to protect. If there is a mismatch in materials, the silicone may not stick properly and fail to provide a seal. 

Time to cure

Some silicones cure faster than others. This time can be important in electronic production lines as it causes a delay. But remember, fast-curing materials may not have the required adhesion or modulus. 

Color

Most electronic applications use a clear silicone sealer spray, but black and white are also available. 

Cost

It is always essential to consider cost versus functionality. 

Spray Silicone Sealer:What’s The Difference Between Silicone And Sealant

Silicone and sealant use different

Silicone and sealant use different base materials. Sealant is acrylic-based and used in construction for sealing gaps and making joints. It is important to avoid exposing sealant to water.

In contrast, silicone is water-resistant. It is also more flexible and lasts longer than acrylic. You can paint acrylic sealant but not silicone. 

 Spray Silicone Sealer:Are All Silicone Sealants Waterproof

All pure silicone sealants are waterproof and will remain so for up to twenty years. However, exposure to some chemicals or excessive heat can damage the silicone and allow moisture through. 

Mechanical damage to the sealant is also a potential problem. For this reason, spray silicone sealer is often used to repair damaged coatings. 

Spray Silicone Sealer:What Is The Best Sanitary Silicone Sealant

The composition of sanitary silicone sealant makes it resistant to mold. Hence, you will find it in the home as a sealant around sinks, in kitchens, and bathrooms. When looking for a sanitary silicone sealant, you should consider: 

Anti-mold and mildew properties

Avoid cheaper brands as they have poor anti-mold properties. Reputable brands include Bostik, Loctite, Electrolube, Uni-bond, Evo-Stik, and Henkel. Home Depot stocks many silicone spray sealant products. 

Aging

Silicone sealants can degrade and discolor over time. Again, a trade-off is necessary between price and quality. 

Spray Silicone Sealer

Dry times 

Some silicone sealants dry within a few hours. Others can take up to 2 days. 

Conclusion

Electronic circuit boards and components must continue to operate in high temperature, high humidity, and corrosive environments. 

Therefore, It is vital to choose protective coating materials for electronic systems carefully. One option is spray silicone sealant. 

It is easy to use, delivers a consistent finish, and allows circuit boards, cables, and connectors to flex. If you need any help selecting a silicone coating material, please get in touch.

Hommer
Hi, I am Hommer, the founder of WellPCB. So far we have more than 4,000 customers worldwide. Any questions you can feel free to contact me. Thanks in advance.

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