Seal + Lock Thread Compound

Seal + Lock Thread Compound is a one-of-a-kind product that combines the power of a thread sealant and a thread locker into one. With this hybrid anaerobic formulation, sealed connections will not loosen and locked fittings will not leak. Formula seals to 1,000 psi, locks to 120 lbs. sq. in. and is temperature resistant between -60°F to 300°F.

This sealant is a smooth, white paste-like compound that is formulated for fast, responsive curing in the absence of air between close fitting metal threads and fixtures.


  • Creates air and water tight seal
  • Cures without cracking or shrinkage
  • Prevents galling and corrosion
  • Controlled strength; removable with hand tools
  • Temperature and solvent resistant
  • Immediate low pressure sealing
  • Easy cleanup; no curing beyond fittings


¢ Threaded freeze plugs
¢ Oil pressure sensor
¢ Fuel line supply nuts and bolts
¢ Threaded fuel injectors
¢ Coolant temperature sensor
¢ Power steering cooler line nuts
¢ Brake master cylinder line nuts
¢ A/C systems
¢ Plumbing systems

¢ Metal plumbing connections
¢ Metal pipe plugs

Properties of cured material
(After 72 hr at 72°F on 3/8-16 steel Grade 8 Nuts and Grade 5 bolts)

Breakaway Strength 50 – 100 in-lbf
Shear Strength >1000 psi
Temperature Range -60°F to 300°F (-51°C to 150°C)