Permatex® Threadlockers fixture in approximately 20 minutes and are fully cured within 24 hours.Permatex® Surface Prep™ activator reduces fixture time to 5 minutes.Preceding values are for 3/8"-16 steel "as received" nuts and bolts at 72degF (22degC). For Use in Heavy Duty Applications Temperature Range to 450degF (232degC) Ideal for 3/8" to 1.5" Fasteners (10 to 38mm) Heat and Special Tools Needed for Disassembly