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Potting and encapsulating compounds are used to provide mechanical reinforcement to housed assemblies,
to fill large voids, and to protect components from the effects of exposure to chemicals, moisture, mechanical
shock, and vibration. Sealing components with potting and encapsulating compounds prevents corrosion and
ensures long-term integrity of the device.

Potting app

Variables to consider when selecting a potting or
encapsulating material include:

• Viscosity of uncured compound
• Dispensing requirements
• Device operating temperature
• Desired chemical resistance
• Desired thermal conductivity
• Desired flame retardants
• Hardness of cured product
• Overall cost

There are a variety of potting and encapsulating
compounds to choose from – epoxy, hot melt, silicone,
and urethane. The thermal properties of epoxy
and silicone systems make them ideally suited for
applications exposed to temperatures above 257°F
(125°C). If a soft, flexible material is needed,
particularly at low temperatures, then a urethane,
silicone or hot melt material may be used.*

*text form Loctite Corp. 2008 Source Book.










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