M.E.T. Water-Proof Engineering Company Limited

Luen Yick Painting & Waterproofing Limited

Standard Waterproofing Engineers Company Limited

Hong Kong Macau Water Proof Company Limited

Pop Waterproofing & Decoration Company Limited

Hop Shing Waterproof Construction Company Limited

Ng Tsz Keung W P Company Limited

Wilson Waterproofing Engineering Company Limited

Tsin Tai Waterproof Limited

Tak Sheng Construction & Waterproofing Limited

Wah Kee Waterproof Engineering Co

Hang Yip Waterproofing Co. Limited

Wheeler Waterproofing (S&C) Limited