Silicone nozzle cover x6, Ultimaker S Series

Silicone Nozzle Cover x6, Ultimaker S Series

The silicone nozzle cover plays a discreet yet essential role in maintaining print stability and cleanliness. This large format model (46.5 x 32.75 mm) is specifically compatible with Ultimaker S Series printers and fits around the print core to ensure effective thermal and mechanical protection.

Its main function is twofold: reducing filament residue adhesion on the heater block and stabilizing the temperature around the nozzle. In practice, a well-maintained silicone cover reduces burnt material buildup, lowers the risk of blobs, and helps maintain consistent extrusion quality, especially during long or technical prints.

This is a consumable part. Over time, heat from the print cores and repeated thermal cycles can cause silicone degradation: hardening, burns, cracks, or deformation. A damaged cover may lead to filament deposits on the heater block and affect thermal stability.

When should you replace your nozzle cover?

We recommend visually checking the cover regularly, especially if:

• the silicone shows burn marks or significant darkening;
• cracks or tears appear;
• the fit around the print core becomes loose;
• you notice unusual filament buildup on the heater block.

Replacement is quick and easy and helps preserve the reliability of your extrusion system. Keeping a stock of spare covers is good practice, especially in professional or continuous production environments.

This set of 6 silicone nozzle covers offers a cost-effective solution to keep your Ultimaker S Series operating under optimal conditions and ensure clean, stable, and consistent printing over time.