Anode Sealing Cap

 Heat Shrink Cap for Anodes

Anode Caps for 4", 3" and 2" Anodes.

     Anode Sealing Caps are used to seal the critical connection between the anode lead wire and the anode.  This heat shrinkable anode cap provides stress relief at the wire connection.  It seals and electrically insulates the end of the anode where the lead wire exits the anode.

     The shrink cap is the ideal solution to prevent premature failure of the anode typically caused by corrosion of the wire connection.  Each cap is expanded to allow clearance for easy installation over the lead wire and the anode.  A rubber based sealant is coated on the inside of the anode cap.  The cap is heated and shrunk to fit tightly on the anode and the anode wire.

     During the heat shrink process, the cap shrinks to conform to the anode and wife while the sealant softens and bonds to their surfaces.  After cooling, the cap remains durable and water tight. 

Anode Cap 2" is supplied on the anode end at 2.5" and will shrink down to 1.75".  On the wire end, it is supplied at .48" and shrinks down to .27".  

Anode Cap 3" is supplied on the anode end at 3.25" and will shrink down to 2.40".  On the wire end, it is supplied at .48" and shrinks down to .27".  

Anode Cap 4" is supplied on the anode end at 4.25" and will shrink down to 4.0".  On the wire end, it is supplied at .48" and shrinks down to .27".  

Anode Shrink Cap

Anode Sealing Cap

     Anode Caps are designed to seal and protect the connection (highly critical) between the lead wire and the anode.  When properly installed, the tight fitting heat shrinkable anode cap provides stress relief, moisture proofs and electrically insulates the end of the anode at the lead wire exit point. It is the ideal solution to the problem of premature system failure due to loss of the wire to anode termination.

Photo of an Anode Cap installed on an anode; protecting the lead wire connection.

     A unique, highly stabilized polyolefin material is used to mold the cap.  During the manufacturing process each cap is expanded to provide plenty of clearance for easy installation over the lead wire and the anode.  A butyl based sealant, designed to adhere to anode materials and wire insulations is uniformly coated on the inside of the cap. 

     During the installation, a propane torch is used to heat and shrink the cap.  As the temperature rises above 265F the sealant softens and the cap shrinks tightly to conform to the anode and lead wire.  When cooled, the cap and sealant provide a durable and water tight encapsulation that will retain its flexibility and integrity over a wide range of temperatures.

    Anode caps are designed for anodes 2", 3" and 4" diameter.  For high reliability in the buried or underwater cathodic protection systems, specify our Anode Caps.