Black Silicone Sock for Prusa MK4 Hot End

Prusa MK4 and MK4S users often face filament sticking and molten blobs on their hotend nozzles, which can cause print defects and downtime. Without proper insulation, heat loss and filament buildup reduce print quality and increase maintenance.

This black silicone sock is designed specifically for the Prusa MK4 hotend, providing thermal insulation and preventing filament from adhering to the heater block and nozzle. It fits all nozzle diameters on the stock MK4 hotend and is compatible with Prusa MK4, MK4S, and XL models. Made from durable silicone, it protects your hotend from damage and helps maintain consistent extrusion temperatures for cleaner prints.

Why Upgrade?

• Prevents filament from sticking to the hotend, reducing nozzle clogs and print defects on Prusa MK4 and XL printers.
• Maintains stable extrusion temperatures by insulating the heater block, improving print consistency.
• Protects the hotend from scratches and damage during filament changes or maintenance.
• Compatible with all nozzle sizes on the stock MK4 hotend, ensuring versatile use.
• Reduces cleanup time by preventing molten filament blobs that can ruin prints.

Best For:

• Prusa MK4 and MK4S owners seeking to improve hotend thermal management.
• Prusa XL users requiring reliable hotend protection and insulation.
• 3D printing enthusiasts using all-metal hotends on Prusa models.
• Users printing with PLA, PETG, or ABS who want to reduce filament buildup on the nozzle.
• Anyone looking to extend the lifespan of their Prusa hotend components.

Pair With the Right Filament

Using this silicone sock helps maintain stable nozzle temperatures, which is essential for consistent extrusion with common filaments.

• PLA Filament — ideal for clean prints with minimal stringing on Prusa MK4.
• PETG Filament — benefits from stable hotend temps to reduce oozing and blobs.
• ABS Filament — improved thermal insulation helps maintain high extrusion temps for ABS.