Master Bond (Hackensack, NJ) offers their X5TC elastomeric system with stronger thermal conductivity ratings and electrical insulation properties. This one-part, no-mix adhesive/sealant has a paste-like consistency and cures in 8-12 hours at room temperature, or in 60-90 minutes at 150 degrees Fahrenheit. X5TC bonds well to metals, glass, composites, ceramics, rubbers and plastics, is suitable for bonding dissimilar substrates, and performs well when subjected to thermal cycling, vibration and shock. The service temperature range is -80 to 250 degrees Fahrenheit and has good resistance to water and oils. It is available for use in ounces, half-pints and pint containers.
https://www.masterbond.com/products/elastomeric-systems