Darkening and preserving compsn. for concrete - contg. tar oil, coal tar pitch, solvents and agents to make it hydrophobic

摘要

Compsn. for darkening and preserving concrete surfaces consists of tar oil, coal tar pitch, additives (I) to make it hydrophobic and solvents. A pref. compsn. comprises 28-40% tar oil, 5-15% coal tar pitch and 10-40% (I).