Potting and encapsulation are two of the most frequently confused terms in electrical and electronic component protection. While both methods serve similar protective purposes, they differ significantly in application method, depth of protection, and service accessibility.
What Is Potting?
Potting is the process of completely embedding an electrical or electronic component inside a resin-filled housing or enclosure. After curing, the component remains embedded inside the resin — and in most cases, re-entry is not possible without destroying the protective mass.
Typical potting applications: LED drivers, transformer coils, sensor housings, cable joints, control boards
What Is Encapsulation?
Encapsulation is the broader term. It covers:
- Full resin embedding (overlaps with potting)
- Partial coverage — protecting only critical areas
- Conformal coating — thin film lacquer coating
- Glob top — droplet coating over integrated circuits
Potting vs Encapsulation: Key Differences
| Criterion | Potting | Encapsulation (General) |
|---|---|---|
| Coverage | Component fully embedded | Full or partial |
| Protection depth | Maximum | Variable |
| Service access | Generally not possible | Varies by method |
| Material used | Polyurethane, epoxy or silicone | Resin, lacquer, gel or polymer |
Conformal Coating: How It Differs
Conformal coating applies a very thin protective film (25–250 µm) to a PCB surface. It provides protection against moisture and dust but does not provide mechanical impact protection or full water immersion sealing — unlike potting.
Protolin System Recommendations
- Permanent potting: Protolin standard polyurethane systems
- Service-accessible encapsulation: NCflex PBD W-25 elastic re-enterable system
- Gel encapsulation: NCgel silicone gel
- Field application: NCpack dual-component pouch format