Formulated for high lubricity, these sealants allow easy assembly of finely threaded hydraulic and compressed air system components. They're also free of fillers that could contaminate system media. These sealants are anaerobic, so they don’t begin to harden until coated surfaces are threaded together, blocking exposure to air. These sealants have medium locking strength, which prevents threads from loosening due to vibration and shock. They require a hand tool to unthread.