Expand-A-Lock is a unique pre-applied microencapsulated expanding threadlocking and sealing compound. Expand-A-Lock increases in volume 20 to 50% on installation, penetrating the gaps in fastener threads that are typically unfilled by conventional threadlockers. Pre-Applied to fasteners, Expand-A-Lock arrives dry to the touch and ready for assembly.
Expand-A-Lock contain a microencapsulated epoxy resin and expanding compounds suspended in a hardener. The forces of engagement crush the microscopic capsules of epoxy resin and expansion agent, mixing the separate reactant components, and initiating a chemical reaction. As the reaction is taking place, the material expands, filling the fastener thread gaps while hardening.
Many threadlockers fail when used in less than optimal conditions, such as misfit parts or with threadformed screws. Because of its expansion properties, Expand-A-Lock can overcome these limitations.
Expand-A-Lock is compatible with most fastener sizes, configurations, materials and finishes. Its epoxy formulation ensures that a strong reliable lock and seal are formed.
The cross-linked molecular structure of Expand-A-Lock makes it one of the most resistant types of adhesives. Oil, gasoline, salt spray, acids, solvents, and water have virtually no effect on parts when introduced after a final cure has been achieved.
Expand-A-Lock has been shown to provide some of the highest break away torques of all our reactive threadlocking materials.
Compared to patch threadlockers, Expand-A-Lock assembles easily with common hand tools.
Expand-A-Lock meets or exceeds all torque requirements of IFI 125, IFI 525, as well as automotive adhesive coated fastener performance specifications.