thixotropic (???ks?'tr?p?k)
— adj
(of fluids and gels) having a viscosity that decreases when a stress is applied, as when stirred: thixotropic paints.Captherm isn't revealing much about its upcoming CT-101-UHP thixotropic thermal compound... but with company lineage that includes CoolIT Systems, ATI and design of R134a watercoolers... well, your guess is as good as ours.
Incidently, USPTO and Google Patents came up blank, too.