*It cannot be used as silicone grease on the CPU. U6-PRO is a high thermal performance, unique, fully cured thermal management solution for electronic assemblies, this material is not dry out. It has low viscosity for dispensing use application; this material have good tacky on the heat-sink can be used for application involving auto-dispensing equipment or stencil screen-printing. Its ideal for rework and field repair situations. Compare with thermal pad this material is can fully fill the gap and good compression, cost saving. U6-PRO is RoHS compliant and halogen-free, offering extra reassurance in applications where hazardous substances are forbidden.