Sealant for steel bolts especially in railway sleepers. Steel bolts corrode after a while and this could make the change impossible because steel parts bonded together. Usual maintenances is getting unnecessary difficult and may damage. HydroProtect sealants are permanent hydrophobic and protect against water the cause of corrosion. The cream like material protect the bolt and its surface as well as the inner lining of the hole. This guarantees that both parts won´t stick and bond together and that changing is easy without damages even after years. In comparison to the sister product, HydroProtect 1107-S is chemical inert and chemical resistant.