Exhibit 21.1

Lydall, Inc. Subsidiary List as of December 31, 2017

I.             Parent Company

Lydall, Inc.

II.           First tier

Lydall Thermal/Acoustical, Inc.

Lydall Performance Materials, Inc.

Lydall International, Inc.

LDL C.V.

Southern Felt Company, Inc.

Lydall North America, LLC

III.          Second tier

Texel Technical Materials, Inc.

Lydall Netherlands B.V.

IV.          Third tier

Lydall Thermal/Acoustical (Taicang) Company Limited

Lydall Performance Materials B.V.

Lydall France S.A.S.

Lydall Holdings GmbH

Lydall Gerhardi GmbH & Co. KG

Lydall UK Ltd.

Texel Geosol, Inc.

Afitex Geosynthetics, Inc.

V.Fourth tier

Lydall Performance Materials S.A.S.

Lydall Thermique/Acoustique S.A.S.

Lydall - Gutsche GmbH & Co. KG

Lydall Industrial Filtration (EMEA) Limited

Lydall Industrial Filtration Textile Manufacturing (EMEA) Limited

Andrew Industries (Hong Kong) Limited

VI.Fifth tier

Lydall Industrial Textile Manufacturing Company (Shanghai) Limited

Lydall Industrial Textile Manufacturing (Wuxi) Company Limited

Lydall Industrial Textile Trading Company (Shanghai) Limited

Acoustique Saint-Nazaire S.A.S.

Gutsche Hodling GmbH

VII.Sixth Tier

Leaseford Enterprises Limited

VIII.Seventh Tier

Gutsche Environmental Technology (Yixing) Company Limited