Potting

Potted Leads:

High temperature silicone rubber or epoxy potting can be used in the lead end of the heater to provide an effective moisture barrier. 

 

Silicone Rubber Seal:

A high temperature silicone rubber seal used with silicone wires provides an effective moisture seal up to 400ºF (200ºC). It is generally the most impervious of the moisture seals. In order to protect the seal, a 1" unheated section is recommended.

 

Epoxy Seal:

Epoxy potting forms a good moisture seal with more mechanical strength than a silicone rubber seal. Regular epoxy is rated at 305ºF (177ºC) and epoxylite is rated at 600ºF (316ºC). In order to protect the seal, a 1" unheated section is recommended.