The key difference is simple: “potting compound” describes the job (encapsulating electronics), while “epoxy” describes one chemistry that can do that job. Epoxy is one of three common potting chemistries, alongside silicone and polyurethane. So an epoxy potting compound is a potting compound, but not all potting compounds are epoxy.
What is a potting compound?
A potting compound is any curable resin poured around an electronic assembly to protect it from moisture, vibration, heat and chemicals. The resin can be epoxy, silicone or polyurethane depending on the requirements. See our full potting compound range.
What is epoxy?
Epoxy is a two-part resin system known for rigid, high-strength, chemically resistant cures. It is widely used both as a structural adhesive and as a potting compound.
Epoxy vs silicone vs polyurethane potting
- Epoxy — hardest, best chemical resistance and adhesion; less flexible
- Silicone — flexible, best high-temperature and stress relief
- Polyurethane — tough and elastic, best vibration damping
Which should you choose?
Choose an epoxy potting compound when you need maximum hardness, adhesion and chemical resistance. Choose silicone for high heat and flexibility, or polyurethane for vibration-heavy environments. The “right” potting compound always depends on temperature, stress and reworkability.
Talk to our engineers for a recommendation and a free sample.