*** Press Release*** Quaker Chemical & Houghton International Receive Final Approval To Combine

CONSHOHOCKEN, Pa., July 24, 2019 /PRNewswire/ — Quaker Chemical Corporation (NYSE: KWR) and
Houghton International announced today that on Tuesday, July 23, 2019, they received approval from
the United States Federal Trade Commission for their combination. This was the final approval
required. The approval is subject to the divestiture of certain product lines comprising approximately
three percent of combined company revenue which is consistent with previous guidance. The
divestiture will occur concurrent with the close of the combination which is expected to be on Thursday,
August 1, 2019.