Bambu Lab Silicone Sock for Induction Hotend - H2C

The Bambu Lab Silicone Sock for Induction Hotend – H2C is a genuine OEM insulating sleeve designed specifically for the H2C induction hotend. Made from heat-resistant silicone, it fits around the hotend to reduce heat loss, shield the nozzle from cooling airflow and help maintain stable extrusion temperatures.

The sleeve also protects the hotend from molten filament residue, making routine cleaning easier and reducing the risk of plastic accumulating around the heated components. Its tear-resistant construction is designed to withstand repeated heating cycles and regular printer operation.

Replace the silicone sock when it becomes cracked, torn, stretched, brittle, loose or heavily contaminated with filament. The package contains three replacement sleeves, allowing worn covers to be replaced without purchasing a complete induction hotend assembly.

Overview

The silicone sock is a black cover that serves the primary function of maintaining nozzle temperature stability and isolating impurities, preventing the filament from soiling the nozzle and affecting print quality.

You should replace the silicone hotend cover if any of the following signs occur:

1. Cracks or Damage
If the silicone cover shows visible cracks or tears, it should be replaced immediately. Any opening can compromise the insulation performance of the hotend, allowing heat to escape and resulting in unstable printing temperatures.

2. Looseness or Detachment
The silicone cover should fit tightly around the hotend. If it becomes loose or easily slips off, it cannot effectively protect the nozzle and heating block. Cold air from the environment may cause temperature fluctuations and could interfere with the printer’s wiping or leveling functions.

3. Deformation Due to Prolonged High Temperatures
Extended exposure to high temperatures can cause the silicone cover to stretch or deform, preventing it from fitting tightly or fully covering the hotend. If deformation is observed, replacement is necessary.

4. Frequent Filament Build-up on the Heating Block
If you notice frequent residue or filament build-up around the hotend, it may indicate that the silicone cover has failed. A damaged cover cannot effectively block oozing or retracted filament, which can lead to clogging and other issues.

5. Discoloration or Brittleness
Prolonged high temperatures can cause the silicone to age, discolor, or become brittle. If any of these signs appear, the cover is nearing failure and should be replaced as soon as possible.

6. Friction With Moving Parts (e.g, Nozzle Wiper)
If the cover comes into contact with the other parts of the 3D printer, it may tear or shift out of place. Repeated friction can cause physical wear or misalignment, exposing the nozzle or heating block and affecting heat retention and distribution. It is recommended to inspect the silicone cover after cleaning.

Installation

Learn more about the replacement of silicone sock on Bambu Lab Wiki.

In the Box

• Silicone Sock/Sleeve x 3

Compatibility

• Bambu Lab H2C

OEM Bambu Lab H2C induction hotend silicone socks insulate the nozzle, stabilize temperatures, resist tearing, and protect against plastic buildup.