Bondloc b542 hydraulic seal is a thixotropic liquid which cures anaerobically to form a tough high pressure seal on all types of threaded couplings used on low medium and high pressure lines used for all types of hydraulic connections and sealing against typical pressure line ratings can also be used to fit valves threaded couplings adaptors quick disconnect parts compression fittings and vibration proofing joints specifications resin dimethacrylate colour brown fixture speed no activator 10 2