Exhibit 4.41.1

Translation into English for

the benefit of Wilmington Trust

Monterrey, Nuevo León, December 14, 2009.

Banco Nacional de México, S.A.,

Integrante del Grupo Financiero Banamex,

División Fiduciaria

Calzada del Valle No. 350 Oriente

1er. Piso

Col.
Del Valle

San Pedro Garza García, Nuevo León 66220

Mexico

Attention:     Nelly Wing

Wilmington Trust (London) Limited

6 Broad Street Place

Fifth Floor

London EC2M 7JH

United Kingdom

Attention:     Elaine K. Lockhart

Reference is made to the Irrevocable Security Trust Agreement in Respect of Stock No. F/111388-5, dated September 3,
2009 (the Agreement), entered into among CEMEX, S.A.B. de C.V. (CEMEX SAB), Empresas Tolteca de México, S.A. de C.V. (Tolteca), Impra Café, S.A. de C.V. (Impra
Café), Interamerican Investments, Inc. (Interamerican), CEMEX México, S.A. de C.V. (CEMEX México), and Centro Distribuidor de Cemento, S.A. de C.V. (Cedice), as
settlors (CEMEX SAB, Tolteca, Impra Café, Interamerican, CEMEX México and Cedice, together, the Settlors); CEMEX México, Cedice, Mexcement Holdings, S.A. de C.V. (Mexcement) and
Corporación Gouda, S.A. de C.V. (Gouda), as issuers (CEMEX México, Cedice, Mexcement and Gouda, together, the Issuers); Banco Nacional de México, S.A., Integrante del Grupo Financiero
Banamex, División Fiduciaria, in its capacity as trustee (the Trustee); and Wilmington Trust (London) Limited, on its own behalf and in its capacity as Security Agent, for the benefit of the Participating Creditors, the
Refinancing Creditors (and their respective successors and assigns) and the other Secured Parties (the Beneficiary). Unless otherwise defined herein, capitalized terms defined in the Agreement, are used herein as therein defined.

On December 14, 2009, CEMEX Finance LLC issued U.S.$1,250,000,000 of 9.50% senior secured notes due
December 14, 2016, and 350,000,000 of 9.625% senior secured notes due December 14, 2017, guaranteed by CEMEX SAB, CEMEX México, Tolteca, CEMEX Concretos, S.A. de C.V., CEMEX España, S.A., CEMEX Corp. and New Sunward
Holding B.V. (together, the Additional Notes). Because the purpose of the Additional Notes is to refinance existing indebtedness and, as a consequence thereof, the Additional Notes will be part of the Refinancing Debt and the
holders of the Additional Notes will be a Refinancing Party, in both cases pursuant to the Agreement, by means of this letter the Settlors and the Issuers hereby inform the Trustee and the Beneficiary, and confirm, that the Additional Notes are
secured in accordance with the terms provided in the Agreement, and are part of the Secured Obligations and the holders of the Additional Notes are Secured Parties.



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We appreciate you acknowledging receipt of this letter, by signing in the
space provided below.



|                      |  |                       |  |                  
|--------------------- |  | --------------------- |  | -----------------
|CEMEX, S.A.B. de C.V.
|                      | 
|By                    |  | /s/ Ramiro Villarreal
|                      |  | Name:                 |  | Ramiro Villarreal
|                      |  | Title:                |  | Attorney-in-Fact 



|                                         |  |                       |  |                  
|---------------------------------------- |  | --------------------- |  | -----------------
|Empresas Tolteca de México, S.A. de C.V.
|                                         | 
|By                                       |  | /s/ Ramiro Villarreal
|                                         |  | Name:                 |  | Ramiro Villarreal
|                                         |  | Title:                |  | Attorney-in-Fact 



|                         |  |                       |  |                  
|------------------------ |  | --------------------- |  | -----------------
|Impra Café, S.A. de C.V.
|                         | 
|By                       |  | /s/ Ramiro Villarreal
|                         |  | Name:                 |  | Ramiro Villarreal
|                         |  | Title:                |  | Attorney-in-Fact 



|                                |  |                    |  |                 
|------------------------------- |  | ------------------ |  | ----------------
|Interamerican Investments, Inc.
|                                | 
|By                              |  | /s/ Agustin Blanco
|                                |  | Name:              |  | Agustin Blanco  
|                                |  | Title:             |  | Attorney-in-fact



|                           |  |                       |  |                  
|-------------------------- |  | --------------------- |  | -----------------
|Cemex México, S.A. de C.V.
|                           | 
|By                         |  | /s/ Ramiro Villarreal
|                           |  | Name:                 |  | Ramiro Villarreal
|                           |  | Title:                |  | Attorney-in-Fact 



|                                             |  |                       |  |                  
|-------------------------------------------- |  | --------------------- |  | -----------------
|Centro Distribuidor de Cemento, S.A. de C.V.
|                                             | 
|By                                           |  | /s/ Ramiro Villarreal
|                                             |  | Name:                 |  | Ramiro Villarreal
|                                             |  | Title:                |  | Attorney-in-Fact 



|                                 |  |                       |  |                  
|-------------------------------- |  | --------------------- |  | -----------------
|Mexcement Holdings, S.A. de C.V.
|                                 | 
|By                               |  | /s/ Ramiro Villarreal
|                                 |  | Name:                 |  | Ramiro Villarreal
|                                 |  | Title:                |  | Attorney-in-Fact 



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|                                |  |                       |  |                  
|------------------------------- |  | --------------------- |  | -----------------
|Corporación Gouda, S.A. de C.V.
|                                | 
|By                              |  | /s/ Ramiro Villarreal
|                                |  | Name:                 |  | Ramiro Villarreal
|                                |  | Title:                |  | Attorney-in-Fact 

Acknowledgment of
receipt:



|                                                                                           |  |                     |  |                    
|------------------------------------------------------------------------------------------ |  | ------------------- |  | -------------------
|Banco Nacional de México, S.A.,Integrante del Grupo Financiero Banamex,División Fiduciaria
|                                                                                           | 
|By                                                                                         |  | /s/ Elva Nelly Wing
|                                                                                           |  | Name:               |  | Elva Nelly Wing    
|                                                                                           |  | Title:              |  | Delegado Fiduciaria
|                                                                                           |  | Date:               |  | 14/12/09           



|                                  |  |                     |  |                     
|--------------------------------- |  | ------------------- |  | --------------------
|Wilmington Trust (London) Limited
|                                  | 
|By                                |  | /s/ Elaine Lockhart
|                                  |  | Name:               |  | Elaine Lockhart     
|                                  |  | Title:              |  | Relationship manager
|                                  |  | Date:               |  | 14/12/09            



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