Using base oils, thickeners, and additives with chemistry designed to high and low viscosity, these products are targeted for use solely in the very-high temperature range. The XHT greases are available with useful temperature ranges up to 360 degrees C (680 F ). Standard Grades XHT-S and XHT-SXOperating range: 250-320 C (482-608F) Typical Applications: Small or large bearings with relatively high speeds. Higher viscosity, lower evaporation of oil extends life. Krytox XHT-S, 2 oz Tube XHTS/2$35.00 Krytox XHT-S, 8 oz Tube XHTS/8$117.00 Krytox XHT-AC, 2 oz Tube XHTAC/2$35.00 Krytox XHT-AC, 8 oz Tube XHTAC/8$117.00 DuPont Specification Sheets