THERMOLOC:

Burning up the competition

ND’s line of Thermoloc™  products were developed as chemical alternatives to all metal locking features.  When compared, Thermoloc materials are more economical in both cost and weight savings.
Typical Applications

Thermoloc  prevents loosening due to the vibration of threaded assemblies, including but not limited to:

  • Furnace Bolts
  • Catalytic Converter
  • Exhaust Manifold
Thermoloc 650
Thermoloc™ 650 is a solvent based threadlocker intended for use in high temperature systems. Thermoloc 650 is factory pre-applied to either internal or external threads and remains inert on the fastener until assembly. Once installed, the resin and hardner mix filling voids in the threads and curing to lock and seal the assembly.
Thermoloc 1500
Thermoloc™  1500 is a threadlocker intended for use in high temperature systems where traditional organic thread lockers fail due to thermal oxidation. Thermoloc 1500 is factory pre-applied to either internal or external threads and remains inert on the fastener until assembled and heat activated.
Performance of Cured Material
Installation Torque < 1.0 N-m
Breakaway Torque 35 N-m
Prevailing Off Torque 11 N-m
k-Value 0.25
Temperature Range -54°C to 232°C
Cure time @ 23°C 24 hours

Please note that installation, breakaway, and prevailing off-torque data are from test results conducted on an M-10 x 1.5 dry phosphate finish bolts and M010 x 1.5 zinc nuts.  Performance may vary depending on fastener finish.

Performance of Cured Material
Installation Torque < 12.0 N-m
Green Breakaway Torque 6 N-m
Green Prevailing Off Torque 6 N-m
Cured Breakaway Torque 30 N-m
Cured Prevailing Off Torque 8 N-m
Temperature Range -40°C to 850°C

Please note that installation, breakaway, and prevailing off-torque data are from test results conducted on an M-10 x 1.5 dry phosphate finish bolts and M010 x 1.5 zinc nuts. Performance may vary depending on fastener finish. Green breakaway values are recorded after 24 hours after installation at ambient temperature. Cured breakaway values were determined after exposing the fastener to 400°C for two hours before returning to room temperature. Green hot strength was determined by exposing the assembled fastener to a given temperature for two hours before testing breakaway strength. Cured hot strength was determined by exposing the assembled fastener to 400°C for two hours, followed by two hours at the testing temperature.

Environment Temperature % of Initial Strength
Brake Fluid 150°C 60%
50/50 Water/Coolant 100°C 57%
High Temperature Aging 232°C 30%
Hot Strength 32°C 69%

Please note that all environmental and fluid testing was conducted as specified in GMW14657. Chemical resistance testing was conducted at temperature for 168 hours; parts were cooled to room temperature prior to testing. High temperature aging was conducted for 500 hours at temperature; parts were cooled to room temperature prior to testing. Percent of initial strength reported is based upon data collected for M-10×1.5 zinc organic finish bolts and M-10×1.5 zinc nuts with the exception of the hot strength, which is based on M-10×1.5

Environment Temperature % of Initial Strength
Brake Fluid 150°C 46%
50/50 Water/Coolant 100°C 243%
5W30 Synthetic Engine Oil 150°C 205%
Gasoline 23°C 20%
Transmission Fluid 150°C 202%
High Temperature Aging (500hrs) 600°C 750%
High Temperature Aging (1000hrs) 600°C 810%
Hot Strength 200°C 179%
250°C 197%
400°C 536%

Please note that all environmental and fluid testing was conducted as specified in GMW14657. Chemical resistance testing was conducted at temperature for 168 hours; parts were cooled to room temperature prior to testing. High temperature aging was conducted for 500 and 1000 hours at temperature; parts were cooled to room temperature prior to testing. Percent of initial strength reported is based upon data collected for M-10×1.5 dry phosphate finish bolts and M-10×1.5 zinc nuts.