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Mainmark provides ground improvement, subsidence remediation, and void-filling services.
Mainmark provides ground engineering services for residential, commercial, industrial, civil, and mining projects. Its technologies include Teretek® resin injection for underpinning and Terefil® flowable fill for voids in pipelines and culverts. Founded in 2001, the company is based in Tokyo, Japan, and operates in Australia, New Zealand, and parts of Asia. In March 2026, it received an investment from Mitsui & Co., Principal Investments.
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