Black Rubber that is resistant to oil, temperature or weather, is resistant to water immersion, solvents or solvents, Harijaya Insulation Surabaya Sell Black Rubber which is used as a raw material for rubber coatings in the lining process to resist corrosion caused by certain chemicals such as oil, oil, solvent or solvent or by water immersion. Selling Black Rubber which is used for bridge bearing rubber products or rubber bearing pads and many other uses of black rubber.