Definition - What does Anode Cap mean?
An anode cap is a device that seals and protects the critical connections between an anode and a lead wire. Anode caps also provide stress relief, electrical insulation and water/moisture proofing at the lead wire exit point.
Anode cap use is considered an ideal and cost-effective solution for premature system failure problems such as a lead wire becoming disconnected from an anode due to corrosion.
Anode caps are also known as heat shrinkable anode caps.
Corrosionpedia explains Anode Cap
Anode caps are manufactured with a special, unique and highly stabilized polyolefin material used to mold the cap. Each cap is expanded in such a way that there is sufficient clearance for easy installation over the lead wire and the anode. A rubber-based sealant is also used with anode caps so the sealant adheres to the anode and the wire insulation is uniformly coated on the inside of the cap.A propane torch is used to heat the anode cap during installation. As the temperature rises above 120°C (250°F), the rubber sealant softens and the cap shrinks tightly to hold the anode and lead wire. When cooled, the cap and sealant provide a durable and watertight encapsulation that will retain its flexibility and integrity over a wide range of temperatures.