Natural BitumenLUMPS in different ASH contents from 3% suitable for Ink and Drilling up to 20-30% suitable for Bitu
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Oxidized BitumenBlown bitumen grades or Oxidized Bitumen are produced by passing air through the penetration grades
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GilsoniteDear Sir/Madam,
We are ZISTA Group of companies, a professional and global supplier of Natural Bitu
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