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Conformal Coatings


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Comparison of Product Families

The table below may help with the choice of which product family best fits your process or application.

 

RTV Elastomeric Coatings

Solventless Heat Cure Coatings

RTV Elastoplastic Coatings

Cure at RT or accelerated at 60C

Yes

No

Yes

Speed of cure

Good at 60C

Very rapid above 100C

Good at 60C

Good cure when confined under large area components

No, requires moisture from air

Yes

No, requires moisture from air

Cured properties

Very soft for optimum stress relief

Very soft for optimum stress relief

Firm, dry surface for best handling properties

Stress relief to components and interconnections

Excellent

Excellent

Good

Room Temperature Bath Life

Good when headspace remains moisture free

Good

Good when headspace remains moisture free

100% solids as supplied

Available

Yes

No

Cure By-Products

Methanol

None

Methanol

Includes UV dye for easy inspection

Yes

Yes

Yes

 

There are also drawbacks to each of the coating families to be aware of.  Solventless Heat Cure Coatings can have their cure inhibited by certain chemicals that are sometimes present from electronic circuit processes or components.  The RTV Elastomeric and RTV Elastoplastic Coatings require moisture for their cure and may have difficulties with highly confined situations.  

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< back to Conformal Coatings Home Page  
 
Selective Coating process

  1. Conformal Coatings Tutorial - What are Conformal Coatings?


  2. Conformal Coatings Tutorial-Options


  3. Key Conformal Coating Characteristics


  4. Conformal Coatings Product Families


  5. Comparison of Product Families


  6. Processing Options


  7. Curing Methods


  8. Packaging and Storage Considerations


  9. Repairability and Component Replacement


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