Exhibit 21.1

img15506421_0.jpg

(5/31/26)

 

Company Name

Place of Incorporation

API S.p.A.

Italy

Arnette Polymers, LLC

Massachusetts (USA)

Carboline Company

Delaware (USA)

Carboline Global Inc.

Delaware (USA)

Carboline (India) Private Limited

India

Clean Bidco Limited (In liquidation)

England & Wales

Clean Midco Limited (In liquidation)

England & Wales

Clean Topco Limited (In liquidation)

England & Wales

DAP Global Holdings, Inc.

Delaware (USA)

DAP Global Inc.

Delaware (USA)

DAP Products Inc.

Delaware (USA)

Day-Glo Color Corp.

Ohio (USA)

Dryvit Holdings, LLC

Delaware (USA)

Euclid Admixture Canada Inc.

Canada

The Euclid Chemical Company

Ohio (USA)

Eucomex, S.A. de C.V.

Mexico

Fibergrate Composite Structures Incorporated

Delaware (USA)

First Continental Services Co.

Vermont (USA)

Flowcrete Group Limited

England & Wales

Flowcrete International Ltd

England & Wales

GJP Holdings Limited

England & Wales

GSD Distribution LLC

Delaware (USA)

Kalzip GmbH

Germany

Key Resin Company

Ohio (USA)

Kirker Enterprises, Inc.

Delaware (USA)

Kirker Europe Limited (In liquidation)

Scotland

Kop-Coat, Inc.

Ohio (USA)

Kop-Coat New Zealand Limited

New Zealand

LBG Holdings, Inc.

Delaware (USA)

Legend Brands, Inc.

Delaware (USA)

Martin Mathys NV

Belgium

Modern Recreational Technologies, Inc.

Delaware (USA)

New Ventures (UK) Limited

England & Wales

New Ventures II (UK) Limited

England & Wales

The Pink Stuff Company USA HoldCo LLC

Delaware (USA)

The Pink Stuff Company USA LLC

Delaware (USA)

Profile Food Ingredients, LLC

Illinois (USA)

Radiant Color NV

Belgium

Ready Seal, LLC

Texas (USA)

RPM Canada, a General Partnership

Canada

RPM Canada Finance Company ULC

Canada

RPM Canada Finance I ULC

Canada

RPM Canada Holding I ULC

Canada

RPM CF Holdings, Inc.

Delaware (USA)

RPM Consumer Group, Inc.

Delaware (USA)

RPM Enterprises, Inc.

Delaware (USA)

RPM Europe Finance Designated Activity Company (“dac”)

Ireland

RPM Europe Holdco B.V.

Netherlands

RPM Europe Logistics NV

Belgium

RPM Europe UK Limited

England & Wales

RPM Funding Corporation

Delaware (USA)

RPM Global Holdco, LLC

Delaware (USA)


RPM Holdco Corp.

Delaware (USA)

RPM Industrial Coatings Group, Inc.

Nevada (USA)

RPM Industrial Holding, LLC

Delaware (USA)

RPM International Inc.

Delaware (USA)

RPM Performance Coatings Group, Inc.

Delaware (USA)

RPM UK Enterprises Limited

England & Wales

RPM UK Finance Limited

England & Wales

RPM UK HOLDCO Limited

England & Wales

RPM US Finco LLC

Delaware (USA)

RPM USA Holdco, LLC

Delaware (USA)

RPM Ventures Netherlands B.V.

Netherlands

RPOW (France) SAS

France

RSIF International Designated Activity Company (“dac”)

Ireland

Rust-Oleum Australia & New Zealand Pty Ltd

Australia

Rust-Oleum Corporation

Delaware (USA)

Rust-Oleum Netherlands B.V.

Netherlands

Schul International Co., LLC

New Hampshire (USA)

Specialty Products Holding Corp.

Ohio (USA)

Star Brands (Holdings) Limited

England & Wales

Star Brands Limited

England & Wales

Star Brands Manufacturing Ltd

England & Wales

Star Brands Partnership Ltd

England & Wales

Star Brands USA Holdings, LLC

Delaware (USA)

Star Brands USA Inc.

Delaware (USA)

StonCor Africa Proprietary Limited

South Africa

StonCor Deutschland GmbH

Germany

StonCor Group, Inc.

Delaware (USA)

StonCor Middle East LLC (49% JV)

United Arab Emirates

TCI, Inc.

Georgia (USA)

T.M.P. – CONVERT SAS

France

Tor Coatings Limited

England & Wales

Toxement S.A.S.

Colombia

Tremco Asia Pacific Pty Limited

Australia

Tremco Barrier Solutions, Inc.

Delaware (USA)

Tremco CPG Germany GmbH

Germany

Tremco CPG Inc.

Delaware (USA)

Tremco CPG Manufacturing Corp.

Delaware (USA)

Tremco CPG Netherlands B.V.

Netherlands

Tremco CPG Sweden AB

Sweden

Tremco CPG UK Limited

England & Wales

Tremco Holdings, Inc.

Delaware (USA)

tremco illbruck Group GmbH (Being merged)

Germany

Tremco Incorporated

Ohio (USA)

United Construction Products, LLC

Colorado (USA)

Universal Sealants (U.K.) Limited

England & Wales

Viapol Ltda.

Brazil

Watco UK Limited

England & Wales

Weatherproofing Technologies, Inc.

Delaware (USA)