IHTG 150 and IHTG 460 are white buttery NLGI #2 grease. The base fluid is an extremely stable per-fluorinated polyether (PFPE ) oil with exceptional chemical resistance, exceptional heat transfer characteristics coupled with very low volatility, and a wide temperature service range. The thickening agent is micronized tetra-fluoroethylene telomere (PFTE). THis Formula is chemically inert, oxidative stable and is nonflammable.