Due to their very nature, connectors are the most vulnerable points in a circuit. Although many connectors are designed for use in harsh environments, too often their service lives are limited by corrosion due to gaps and other leak paths (even microscopic porosity) in the wires, insulation, plastic housing, and pins.
Potting and vacuum impregnation are two of the most popular methods to close off any electrical component leaks. The best way to protect your electrical components is through vacuum impregnation. This is because the sealant impregnated into the part will uniformly and economically seal the part.
Vacuum resin impregnation is the most cost-effective method to completely eliminate corrosion problems in electronic connectors and associated wiring harnesses. Whereas potting can be an expensive solution to the problem due to the tooling, cycle time, and labor costs.
In addition to filling visible gaps between the parts of a connector, the process prevents unseen internal galvanic corrosion problems by filling microscopic gaps and porosity throughout the connector and associated wiring - impossible with potting.
This added reliability, together with high, repeatable sealing percentages and low-cost benefits due to bulk processing, make the vacuum impregnation process an economical solution for all connectors subjected to mild environments and a must for connectors in harsh environments.