T-99 Heat Transfer Compound

T-99 is a specialty high temperature heat transfer compound formulated to provide high thermal stability and bond strength up to 1204°C (2200°F). Unlike other grades of heat transfer compounds, it is also electrically non-conductive (when cured). It is supplied ready to use and may be applied by hand troweling to fill TFK channels.

T-99 resists thermal and mechanical shock and provides an efficient heat transfer rate with a high bond strength. In order to promote good surface wetting and ensure contact, the surfaces of traced valves, pumps and other equipment must be prepared just as though a paint or primer is to be applied. Oil, grease, dirt, rust, scale, etc., must be removed. The use of solvents and emulsions along with scraping, chipping and wire brushing are common pre-treatment techniques for steel surfaces.


  • Thermally stable at continuous temperature exposures up to 1200°C (2200°F)
  • Electrically non-conductive
  • Exceptional bond strength to resist thermal expansion and contraction
  • High shock resistance when exposed to extensive thermal cycling


Container sizes 3.79 liter (1 gallon)
Maximum exposure temperature 1204°C (2200°F)
Minimum exposure temperature -196°C (-320°F)
Minimum installation temperature 0°C (32°F)
Heat transfer coefficient, Ut, tracer to pipe wall 85-170 w/m2-°C (15-30 Btu/hr-°F-ft2)
Shelf life (unopened) 1 year
Bond Strength (ASTM D1002) > 2760 kPa (> 400 lbs/in2)
Water Soluble Chlorides (ASTM C1218) < 100 ppm
Water-soluble yes