Liquid 4-Liter Refill - Non-Hazmat, Non-Flammable & Non-Toxic *Case of 4* Corrosion Block is a clean fluid that actively protects metal using advanced polar bonding chemistry.  Synthetic additives in Corrosion Block completely penetrate corrosion cells…replacing the salt water which is then allowed to evaporate.  Corrosion Block’s hydrophobic film remains to further protect the metal acting like an “OFF SWITCH” for corrosion. Unlike waxy products Corrosion Block then leaves a clean clear moisture proof/hydrophobic film to prevent new corrosion formation. deeply penetrating into joints, connectors and around fasteners.  Features: * Formulated to KILL CORROSION ON CONTACT from completely submerged, to equipment affected by high moisture content in the air * Corrosion Block is a clean fluid that actively protects metal and electronics using advanced polar bonding chemistry * Synthetic additives in Corrosion Block completely penetrate corrosion cells...replacing the salt water which is allowed to evaporate * A hydrophobic film remains to further protect the metal acting like an 'OFF SWITCH' for corrosion * Corrosion Block is safe; it is non-toxic and non-flammable, also the propellant used in our aerosol products is non-flammable * Used worldwide to protect electrical and mechanical equipment in 'Safety First' situations such  as Mining, Power Generating Stations, Fuel Depots, Gas and Petroleum refineries and more Protects: * Switches * Pressure Gauges * Motor Operated Valves * Terminal Strips * Circuit Breakers * Locks  * Electronics * Battery Terminals * Running Lights * Fuel Tanks * Fuse Panels * Connectors * Alternator Leads * Reefer Unit Wheels & Hubs * Engines GPS Systems