CRC 336,CRC 3005 Plastic safe lubricant, penetrant and corrosion inhibitor that helps prevent electrical malfunctions caused by water penetration, humidity or condensation. Cleans, lubricates, penetrates and loosens corrosion. Instant protection for building and general maintenance Description: CRC 3-36 prevents rust and corrosion by displacing and sealing out moisture and by forming a continuous protection barrier against water and oxygen