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Silicone Molding and Welding

Molding is the process of melting and modifying a material to incorporate it into a mold with in order to get a final product with a certain shape. In Merefsa the molding process is performed by compression and injection.

  • Injection moulding is the process by which thanks to the injection of high pressure silicone in a mould, parts are produced with a geometry previously designed and machined. In addition to this more usual process, there are several types of mold that will go depending on the characteristics of the mold. final product as co-injection, bi-injection and overmoulding.
  • Compression molding is the process composed of parts in which silicone it is deposited in an open mold and with high temperature to which pressure is subsequently exerted in order to that acquires the form of the same and with the heat vulcanize perfectly.
Tipos de corte y maquinaria disponible en Merefsa

Molds in Merefsa

We have single-cavity or multiple-cavity moulds. It will depend on the solution of engineering that our Design department considers most appropriate and that represents the most adjusted costs and minimum time of service to our client. The moulds are normally made of metal for tools (iron, stainless steel, aluminium...). We have our own machining section for the manufacture of moulds, tools and dies, with electro-erosion machine, milling machine, CNC, digital control lathes and automatic lathe.

Tipos de corte y maquinaria disponible en Merefsa

Molding solutions in Merefsa

We manufacture samples, prototypes and large series. We offer customized solutions with Any hardness, color and additive. Our process of manufacturing silicone gaskets by hot compression molding and welding, we it allows to supply any type of form under plane or sample, in small, medium or large series, with or without textile, metallic or bicomponent insert. The silicone parts are post cured after their Vulcanized in hot air oven with forced circulation.

Tipos de corte y maquinaria disponible en Merefsa

Welding process

Extensive know-how in welding profiles with its own technology, production and development of Our own molds and dies. Types of welding:

  • Angled (Frames, ...).
  • Forward (o-rings, profiles, tubes, ...).
  • Sheets, Bands, Sleeves, ...
  • Multicomponent.
  • Solutions in final product of various materials.

Tipos de corte y maquinaria disponible en Merefsa

Most common silicone moulding products

Tipos de corte y maquinaria disponible en Merefsa

Silicone moulding tolerances at Merefsa, standards and certifications

Our quality in all processes and molding tolerance is the most accurate in the market, which allows us to have the most extensive range of silicone gaskets, with the best quality and the most competitive prices in the sector.

There are 4 types of internationally accepted tolerances, "M" for molding:

  • Type M1 = Highest quality.
  • Type M2 = Good quality. (Standard in Merefsa).
  • Type M3 = Uncritical

STANDARDS AND CERTIFICATIONS: We have the means to ensure that our products comply with the general regulations and the most specific certification regulations in manufacturing:
ISO 9001 & ISO 14001. - TS 16949, UNE-EN ISO 13485, … - OHSAS 18001. - ISO 3302-1

Consorcio del Caucho
Alianza Empresarial para la Vacunación Infantil


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De acuerdo con las disposiciones del Reglamento General de Protección de datos, 679/2016 del mes de mayo de 2016, (en adelante, RGPD), le informamos que sus datos personales quedan recogidos en un fichero titularidad de Manufacturados Españoles de Resinas Fluoradas, S.L.U., con NIF B08207284, y sita en Av. Segle XXI 56, 08840 -Viladecans de Barcelona. Tratamos la información que nos facilita con el fin de prestarle el servicio solicitado así como para mantener la relación comercial según la legalidad vigente. Los datos proporcionados se conservarán mientras se mantenga la relación comercial o durante los años necesarios para cumplir con las obligaciones legales. Los datos no se cederán a terceros salvo en los casos en que exista una obligación legal. Usted tiene derecho a obtener confirmación sobre si en Manufacturados Españoles de Resinas Fluoradas, S.L.U. estamos tratando sus datos personales, por tanto tiene derecho a acceder a sus datos personales, rectificar los datos inexactos o solicitar su supresión cuando ya no sean necesarias. Para ello deberá solicitarlo por e-mail a, o bien dirigir una carta certificada a la dirección indicada.


Av. Segle XXI, 56 08840 Viladecans

Barcelona ( Spain)

Tel (+34) 933 372 081

Fax (+34) 933 374 373

Schedules & Calendar:

Monday to thursday from 8:15 to 13:00

Monday to thursday from 14:00 to 17:15

Friday from 7:00 a 14:15

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