-WD-40 is a mixture of chemical concentrates suspended in a high grade petroleum distillate.-Will not affect fabrics, rubbers or plastics.-working temperature is between -100F and 500F.-WD-40 is an all purpose liquid for displacing moisture, corrosion control, lubrication,cleaning and penetration.-WD-40 has the ability to penetrate the minute grain boundaries on all metals. Although not essentially a lubricant, -WD-40 is regularly used to lubricate all light machinery and electrical equipment.