Asphalt coating material for pipes

A coating material for coating a corrugated pipe, comprising asphalt and polymer dissolved in organic solvent, the coating material having rheological properties such that it can be easily applied at ambient temperature to form a coating on the pipe, the coating material being a thixotropic gel at ambient temperature such that the coating material liquefies when being applied and re-forms a gel after application, the coating after drying being resistant to abrasion as measured by at least about 1,000,000 revolutions before failure when tested by ASTM A 926-97, Procedure 7.4, and the applied coating material being resistant to flow at ambient temperature such that the coating material can be applied in a single application to form a coating having a thickness after drying of at least about 50 mils (0.13 cm) with substantially no sagging of the coating.

A method of coating a pipe to improve the abrasion resistance of the pipe, the method comprising applying a coating material which comprises asphalt and polymer dissolved in organic solvent, the coating material being applied at ambient temperature to form a coating on the pipe, the coating after drying being resistant to abrasion as measured by at least about 1,000,000 revolutions before failure when tested by ASTM A 926-97, Procedure 7.4.