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- Jan. 1964 Founded Union White Cement Co.,
Ltd.
- Jul. 1977 Rename to Union Corporation.
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- Sep. 1980 Built Cheongju Factory for White Cement.
- May. 1986 Built the Factory for Tile Adhesive
Cement.
- Jun. 1987 Acquired the License for Using the KS
Certification.Mark For White Cement.
- Nov. 1987 Built the Factory for Alumina
Cement.
- Jun. 1988 Commenced
Manufacturing.Super-Speed Hardening Cement.
- Aug. 1988 Organized the Environmental business
Division.
- May. 1989 Acquired the License for Using the KS
Certification. Mark for Tile Cement.
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- Dec. 1990 Established the Annex Research
Institute.
- Oct. 1991 Built the Factory for Alumina.
- Oct. 1992 Built the Factory for Union
Crete.
- May. 1993 Built the Factory for Self-Levelling
Mortar.
- Aug. 1993 Commenced Manufacturing
UAC-80/80S.
- May. 1994 Built Giheung Logistics Center
- Jul. 1994 Commenced Manufacturing Grout
HS.
- Aug. 1995 Built Pohang Factory for
Dry-Mortar.
- Jun. 1996 Offered the Corporation's Stocks to
Public Sale.
- Sep. 1996 Commenced Manufacturing Grout GM.
- Dec. 1996 Acquired the ISO 9002
Certification.
- Apr. 1997 Commenced Manufacturing the Organic Construction Finish Material
- Jul. 1997 Built the factory for Unistone
- Sep. 1998 Technical Tile-up with Harris Specialty
Chemicals, Ins. USA
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- Oct. 2000 Built the High Alumina Cement
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