Exhibit 21.1

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(5/31/25)

 

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

Carboline Norge AS

Norway

Clean Bidco Limited

England & Wales

Clean Midco Limited

England & Wales

Clean Topco Limited

England & Wales

Corgrate Fiberglass Systems, S.A. de C.V.

Mexico

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

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)

Key Resin Company

Ohio (USA)

Kirker Enterprises, Inc.

Delaware (USA)

Kirker Europe Limited

Scotland

Kop-Coat, Inc.

Ohio (USA)

Kop-Coat New Zealand Limited

New Zealand

LBG Holdings, Inc.

Delaware (USA)

Legend Brands, Inc.

Delaware (USA)

Mantrose-Haeuser Co., Inc.

Massachusetts (USA)

Martin Mathys NV

Belgium

Modern Recreational Technologies, Inc.

Delaware (USA)

Morrells Woodfinishes Limited

England & Wales

New Ventures (UK) Limited

England & Wales

New Ventures II (UK) Limited

England & Wales

Profile Food Ingredients, LLC

Illinois (USA)

Radiant Color NV

Belgium

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 UK Limited

England & Wales

RPM Funding Corporation

Delaware (USA)

RPM German Real Estate GmbH & Co. KG

Germany

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 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)

SPS B.V.

Netherlands

Star Brands (Holdings) Limited

England & Wales

Star Brands Limited

England & Wales

Star Brands Manufacturing Ltd

England & Wales

Star Brands USA Inc.

Delaware (USA)

StonCor Africa Proprietary Limited

South Africa

StonCor Deutschland GmbH

Germany

StonCor Group, Inc.

Delaware (USA)

StonCor Group SA Proprietary Limited

South Africa

StonCor Middle East LLC (49% JV)

United Arab Emirates

TCI, Inc.

Georgia (USA)

The Euclid Chemical Company

Ohio (USA)

The Pink Stuff Company USA Holdco LLC

Delaware (USA)

The Pink Stuff Company USA LLC

Delaware (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 Australia Pty Ltd

Australia

Tremco CPG France SAS

France

Tremco CPG Germany GmbH

Germany

Tremco CPG Inc.

Delaware (USA)

Tremco CPG (India) Private Limited

India

Tremco CPG Malaysia Sdn. Bhd.

Malaysia

Tremco CPG Manufacturing Corp.

Delaware (USA)

Tremco CPG Netherlands B.V.

Netherlands

Tremco CPG Poland sp. zo.o.

Poland

Tremco CPG Sweden AB

Sweden

Tremco CPG Turkey Diș Ticaret A.S.

Turkey

Tremco CPG UK Limited

England & Wales

Tremco Holdings, Inc.

Delaware (USA)

tremco illbruck Group GmbH

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)