Based on this product's specifications, here are some alternatives and similar models
Thermal paste PROLIMATECH PK-Zero 8 W/m·K — 5 g thermal interface compound
Summary description:
PROLIMATECH PK-Zero is a thermal interface compound with thermal conductivity of 8 W/m·K and density 2.6 g/cm³ supplied in a 5 g tube. Designed to improve heat transfer between CPU/GPU and heatsinks, it fills microscopic gaps to lower operating temperatures. Suitable for desktop processors, graphics cards and other electronic cooling applications where a high-conductivity paste is required.