Silicones and Electronics
Long-term, reliable protection of sensitive circuits and components is becoming more important in many of today’s delicate and demanding electronic applications. Silicones function as durable dielectric insulation, as barriers against environmental contaminants and as stress-relieving shock and vibration absorbers over a wide temperature and humidity range. In addition to sustaining their physical and electrical properties over a broad range of operating conditions, silicones are resistant to ozone and ultraviolet degradation, have good chemical stability and are available in a variety of useful forms as conformal coatings, encapsulants and adhesives. Dow’s broad range of general purpose and specialty products offers you a choice of materials for your application needs.

Dow silicone encapsulants are supplied as two-part liquid component kits comprised of:
Mix Ratio Components (by weight or volume) (as supplied)
1:1 Part A/Part B
10:1 Base/Curing agent
When liquid components are thoroughly mixed, the mixture cures to a flexible elastomer, which is suited for the protection of electrical/electronic applications.

Dow silicone encapsulants cure without exotherm at a constant rate regardless of sectional thickness or degree of confinement.

Dow silicone elastomers require no post cure and can be placed in service immediately following the completion of the cure schedule with an operating temperature range of -45 to 200 °C (-49 to 392 °F). Select materials have been classified by Underwriters Laboratories and/or meet military specifications.

Standard silicone encapsulants require a surface treatment with a primer in addition to good cleaning for adhesion while primerless silicone encapsulants require only good cleaning.