Exhibit 21

GCP APPLIED TECHNOLOGIES INC.

U.S. SUBSIDIARIES

SUBSIDIARY NAME	STATE OF INCORPORATION
AP Chem Incorporated	MD
Construction Products Dubai, Inc.	DE
Darex Puerto Rico, Inc.	DE
De Neef Construction Chemicals (US) Inc.	TX
Dewey and Almy, LLC	DE
GCP International Inc.	DE
GCP Chemicals Inc.	DE
GCP Europe Inc.	DE
Hanover Square Corporation	DE
Verifi LLC	DE
Water Street Corporation	DE

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Exhibit 21

GCP APPLIED TECHNOLOGIES INC.

NON-U.S. SUBSIDIARIES

ARGENTINA

GCP Argentina S.A.

AUSTRALIA

GCP Australia Pty. Ltd.

BELGIUM

De Neef Construction Chemicals BA

GCP Applied Technologies N.V./S.A.

GCP Construction Products N.V.

Inverco Benelux N.V.

BRAZIL

GCP Brasil Indústria e Comércio de Produtos Químicos Ltda

CANADA

GCP Canada Inc.

CHILE

GCP Quimica Compania Limitada

CHINA - PEOPLE’S REPUBLIC OF

GCP Applied Technologies (China) Company Limited

COLOMBIA

GCP Colombia S.A.

FRANCE

De Neef France S.A.R.L.

GCP Produits de Construction SAS

GERMANY

De Neef Deutschland GmbH

GCP Applied Technologies Holdings Germany GmbH

GCP Germany GmbH

GREECE

GCP Applied Technologies Hellas LLC

HONG KONG

GCP (Hong Kong) Limited

INDIA

GCP Applied Technologies (India) Private Limited

INDONESIA

PT. GCP Applied Technologies Indonesia

IRELAND

GCP Products (Ireland) Limited

ITALY

GCP Italiana S.p.A.

JAPAN

GCP Applied Technologies Holdings Japan GK

GCP Chemicals Kabushiki Kaisha

KOREA

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Exhibit 21

GCP Korea Inc.

MALAYSIA

GCP Applied Technologies (Malaysia) Sendiran Berhad

MEXICO

GCP Applied Technologies S.A. de C.V.

NEW ZEALAND

GCP (New Zealand) Limited

PANAMA

W. R. Grace (Panama) S.A.

PHILIPPINES

GCP Applied Technologies Operations Center, Inc.

GCP Applied Technologies Products (Phils.) Inc.

POLAND

GCP (Poland) Sp.z o.o.

PORTUGAL

De Neef Portugal, LDA

RUSSIA

GCP Rus LLC

SINGAPORE

GCP (Singapore) Private Limited

SOUTH AFRICA

GCP Applied Technologies Africa (Pty) Ltd.

SPAIN

De Neef Technologies S.L.

GCP Construction Materials Spain, S.L.

SWEDEN

De Neef Scandinavia AB

GCP Sweden AB

GCP Applied Technologies Sweden AB

SWITZERLAND

De Neef (CH) AG

GCP Switzerland S.A.

Union Société Financière S.à.r.l.

TAIWAN

GCP Taiwan, Inc.

THAILAND

GCP Applied Technologies Holdings (Thailand) Limited

TURKEY

GCP Uygulamalı Teknolojiler ve Yapi Kimyasallari Sanayi ve Ticaret A.S

UNITED KINGDOM

De Neef UK Ltd.

GCP Applied Technologies Holdings (UK) Limited

GCP Applied Technologies (UK) Limited

GCP Construction Products Holdings (UK) Limited

GCP Products UK Limited

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Exhibit 21

GCP (UK) Holdings Limited

GCP RIW Holdings Limited

RIW Holdings Limited

R.I.W. Limited

Stirling Lloyd Polychem Limited

Stirling Lloyd Products International Limited

VIETNAM

GCP Vietnam Company Limited

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