Fluid with tetrafluoroethylene telomer. This grease resists oxidation and aggressive chemical reagents, compatible with glasses, metals, and elastomers. Lubricates o-rings and glass or metal joints designed for vacuum. In non-vacuum uses RT-15 seals joints in gas and liquid transport systems having hot and reactive flowing materials. Sold in 100 gram tubes. For MSDS of this RT-15 grease see Available Downloads below.