Key Advantages of LPO
Attribute Potting Conformal Coating LPO
Encapsulation Yes, with a small failure rate. No. Yes, with virtually no failures.
Sleek profile No: requires housing. Yes, coverage is very thin. Requires housing for many applications. Yes, but thicker than conformal coating: no housing required.
Field Failure Low due to encapsulation, most problems are from material defects due to poor processing management, or moisture penetration of silicone. High due to lack of complete encapsulation. Extremely low.
Freeform design flexibility No. No. Yes.
Liquids required in inventory Yes, two. Yes, one typically, some require two. No.
Housing and fasteners Required. Must at least have one mechanism to secure assemby in place. No.Not required. Design considerations may necessitate grommets.
Ongoing setup preparation during shift Yes, mixing tube replacement and compound setup. Spray tip adjustments and cleaning. No.
Curing time Yes, up to 24 hours. Long if heat cured up to 60 minutes. Short cure time if it is a UV cure. No curing, up to 2 minute phase change in mold.
Curing time
Water and/or chemical residue on assemblies
Possible. Possible. No.
Hazardous material issues Yes for Urethane based potting compounds, they contain TDI and MDI carcinogens and asthma agents.
Spills require a hazmat type response.
Yes, if liquids are spilled, full containment action is required.
If packed in syringes, spill reaction is not as great but solvent based cleaners are still required.
Silicone migration issues

Yes for silicone based compounds.

Liquid and potentially hazmat dunnage.
Yes for silicone based compounds.

Liquid dunnage.

Recyclable dry residue.