It is very important to note that the friction coefficients of assembly lubricants vary dramatically making it difficult to consistently produce the exact amount of stress within the fastener to clamp the components together. That's why ARP has introduced this superior and consistent assembly lube. Features: Premium-grade, graphite-base with rust and corrosion inhibitors. Effective lubrication range from -30° to 750° Fahrenheit. Load range is 500,000 psi. Primary assembly lube for engine components, press fitting, gear trains and general machinery.