0.5g GD900 Thermal Grease/Paste for 3D Printer

Description

Better Heat Transfer for Your Hotend

GD900 thermal grease is applied between the heatbreak and heatsink in your 3D printer’s hotend to improve heat transfer across the metal-to-metal contact surfaces. Even machined surfaces have microscopic air gaps that act as insulation — thermal grease fills those gaps, creating a continuous thermal path that moves heat away from the melt zone more efficiently.

Better heat transfer means more stable nozzle temperatures, reduced heat creep, fewer jams in the cold zone, and more consistent extrusion — particularly during long prints and when printing high-temperature materials.

When to Use Thermal Grease

Apply GD900 thermal grease whenever you install or replace a heatbreak, reassemble a hotend after maintenance, or notice heat creep symptoms like filament softening above the melt zone causing jams. A thin layer between the heatbreak and heatsink is all that’s needed — more is not better, as excess paste can ooze and attract dust.

Common applications include Bambu Lab, Creality, Prusa, Anycubic, ELEGOO, and Voron hotend assemblies — any printer where a heatbreak threads or slides into a heatsink.

Specifications

Thermal conductivity: 4.8 W/m·K
Operating temperature: -50°C to 350°C
Electrical conductivity: non-conductive — safe around electronics
Corrosion: non-corrosive
Package: 0.5g single-use sachet — enough for one hotend application

Application Tips

Clean both surfaces before applying — remove old thermal paste with isopropyl alcohol. Apply a thin, even layer to the heatbreak where it contacts the heatsink. Reassemble the hotend and tighten to spec. Avoid applying to the nozzle threads or inside the melt zone.