Encapsulants (or pottants) are protective materials used to
completely embed electronic circuitry. Typically, they are used to isolate
circuits from the harmful effects of moisture and other contaminants, provide
electrical insulation for high voltages and also protect the circuit and
interconnections from thermal and mechanical stresses. Encapsulants are
typically applied in thick layers--exceeding 125 mils.
Dow Corning ® silicone encapsulants are supplied as solventless, two part
liquid component kits. Many are designed for 1:1 mix ratios (parts A and
B). Others are formulated for mixing at 10:1 ratios (base and curing
agent). When the two liquid components are thoroughly mixed, the mixture
cures to a flexible elastomer. Some products will cure at room temperature
while others are designed to be cured by heat. |
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