Thumbnail for HK Sewer | Manhole Spraying with ArmorThane Polyurea: Manhole-Spraying-with-ArmorThane-Polyurea 09/19/2012 HK Sewer | Manhole Spraying with ArmorThane Polyurea Video of ArmorThane Training Hong Kong Applicators How to Repair Manhole Sewer Systems and Spray Permanent Moisture-Resistant Polyurea…