Stopaq® 4100 Putty is a non-toxic material, suited for application on steel pipelines and adjacent factory coatings like PE, PP, FBE, etc. It displaces water, is fully resistant to water and has a very low permeability. It is designed for use on buried constructions as well as inside constructions with low to medium service- and ambient temperatures. It is used as a corrosion protective moulding compound for filling of voids and leveling of irregular surfaces, prior to application of a Stopaq® mechanical protective coating system. The compound does not cure and will not build-up internal stresses. Objects coated with Stopaq® 4100 Putty should be protected against mechanical impacts and indentation, e.g. by covering it with a protective layer of Stopaq® Geotextile and Stopaq® Outerwrap.