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Conformal Coatings

Electronics Modules - Board Coating

For Board Coating, select one of Dow Corning's Conformal Coatings. Here are some items for consideration in choosing the appropriate material for your use:

  • There are soft, stress-relieving, elastomeric coatings for fine pitch or sensitive components. Both heat curing and RTV cure elastomeric coatings are available or choose a tough, abrasion-resistant coating for mechanically harsh environments. These tougher coatings are solvent-borne, but versions diluted with VOC exempt solvents are available also.
  • For higher volume applications or where emissions are not desired, solventless coatings are often preferred.
  • While heat cure and RTV cure coatings can either be dipped or sprayed, it is more common to see heat cure coatings used for dip coating and RTV cure coatings used for spray. Either can be used for selective spray coating but the RTV are more common.
  • Heat acceleration of RTVs is done at a maximum temperature of 60° C.
  • For selective coating and spray coating, viscosities of less than 500 cps are typical. For dip coating viscosities of >500 cps are typically used to get sufficient film build. Higher viscosities are used to get spot pin coverage in extreme environments or where higher film builds are needed.
  • A number of these products have UL or Mil Spec approvals.


Additional Information on Board Coating

Conformal Coatings Product Information

Conformal Coatings Tutorial

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