This rust control product is a non-drying medium viscous oil type protective coating. This thixotropic rust preventatives is designed to be pumped at ambient temperature from the drum into the annular areas of between pipelines and the carrier pipe. Casing Filler also contains an extremely effective polar type corrosion inhibitor, which has a greater tendency than water to be absorbed on steel surfaces. Thus, Casing filler will preferentially wet both surfaces on the casing and carrier pipe completely displacing all moisture and/or water in the process and absorbing it. This antirust coating also prevents water from entering any filled spaces.