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 or bond together and allow changing without damages, even after years. The sister product HydroProtect 1107-S comes with an additional benefit of higher chemical resistance.