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Inflatable silicone seals

Custom-made inflatable silicone seals for autoclaves, dynamic seals for laboratories, metallic or silicone valves.

Our inflatable seals provide total sealing against gases, liquids and solids.

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The Silicone and PTFE Factory

MEREFSA is expert in manufacturing products with:

  • PTFE

Industrial sectors

We manufacture products for industrial sectors that carry out very diverse activities. Our commercial, design and quality team is able to advise and provide optimal solutions with the highest quality and speed to any product requested by our customers.


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Merefsa at InnoTrans from September 20th to 23rd 2022

At InnoTrans 2022 we will be presenting the latest developments in rail transport worldwide.


Visit us at the stand 120 | Hall 8.1., we will present all Chlorine Free Silicone formulations.

Get your ticket for the world's most important International Railway Fair in Berlin!


We are waiting for you!

InnoTrans 2022

Extrusion, molding, welding and silicone die cutting

With near to 50 years of experience and more than 4000 different dies, we are one of the largest silicone manufacturers by extrusion, with all types and shapes of silicone profiles at your disposal.


Silicone Profile Finder


Our machining workshop, with manual lathes, numerical control lathes, automatic and CNC lathes, allows us to manufacture any type of part in any technical plastic.


Extrusion of silicone profiles and tubes

With about 50 years of experience in the extrusion of cords, tubes, profiles, sheets, bands and about 4000 different rows, we are one of the largest and most specialized silicone transformers in southern Europe. We export to the five continents, with the firm commitment of quality and service to our customers.

It is company policy to reinvest our benefits, in the acquisition and purchase of new technologies, increasing our machinery park year after year.

Silicone Profile Finder

Manufacture of silicone compounds for extrusion and moulding

In our compounding facility we prepare the silicone raw material and add it with the necessary chemicals according to our customers' needs.

We manufacture compounds to measure, for those customers who need specific solutions. Tell us your requirements and we will help you to find your silicone.

Starting from 25 kg batches, we can manufacture any compound and colour.

Specialists in processes with silicone and PTFE

At MEREFSA we are specialists in all processes related to silicone and PTFE.


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Fairs and Exhibitions

MEREFSA regularly participates in some of the most important trade fairs. As well as in events of different industrial sectors both at European and global level.


Wire EDM process - Silicone extrusion dies - Merefsa

Manufacture of dies by EDM wire EDM. We show the EDM wire EDM process in which we visualize how a die is manufactured to extrude a silicone profile from a metal support which is given the previously designed shape. Our machining plant has the latest technology in wire EDM +GF+ machines. Electrical discharge machining EDM is an extremely precise manufacturing process that uses electrodes, dielectric fluid and an electric current to cut metals. This video shows all the processes involved in the manufacture of a silicone extruded profile: the design process in the Technical Office, the process of creating the die for the wire EDM extruder nozzle and the final extrusion of the weatherstrip. Merefsa is one of the largest manufacturers of silicone profiles in Spain. They comply with FDA certification. With our extensive experience, the Technical Office and machining departments design and can manufacture dies to produce this product in almost any geometry and specifications. We have nearly 4,000 different silicone profile extrusion dies, also known as silicone weatherstripping, including shapes as diverse as T, h, e, P, L, U, OO, autoclave, scraper, etc. The main applications of silicone profiles are sealing gaskets in all types of industries and processes, although the field of application in industry is almost infinite. It is used as electrical insulation, inflatable gaskets for autoclaves, sealing gaskets for the lighting industry, gaskets for insulating oven doors, enclosure gaskets for aluminum profiles, gaskets for dyeing autoclaves in the textile industry, welding profiles in the manufacture of plastic bags, embellishing profiles in any industry, etc. We can also manufacture them in detectable silicone, steam, platinum, fluorinated, etc. and approved with FDA certification, being perfect for use in the food and pharmaceutical sector.



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Meshes and Fabrics

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Meshes and Fabrics

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Alianza Empresarial para la Vacunación Infantil
ED Empleo
Consorcio del Caucho
Control Energético


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fill the following form. We will answer you as soon as possible.



In accordance with the provisions of the General Data Protection Regulation, 679/2016 of May 2016, (hereinafter, RGPD), we inform you that your personal data will be included in a file owned by Manufacturados Españoles de Resinas Fluoradas, S.L.U., with NIF B08207284, and located in Av. Segle XXI 56, 08840 -Viladecans de Barcelona. We treat the information you provide us with in order to provide you with the requested service as well as to maintain the commercial relationship in accordance with current legislation. The data provided will be kept as long as the commercial relationship is maintained or for the years necessary to comply with legal obligations. The data will not be passed on to third parties except in cases where a legal obligation exists. You have the right to obtain confirmation as to whether Manufacturados Españoles de Resinas Fluoradas, S.L.U. is processing your personal data. You are therefore entitled to access your personal data, rectify inaccurate data or request their deletion when they are no longer necessary. To do so, you must request it by e-mail to, or by sending a registered letter to the indicated address.


Av. Segle XXI, 56 08840 Viladecans

Barcelona (Spain)

Tel (+34) 933 372 081

Fax (+34) 933 374 373

Office Schedule

Monday to Thursday from 8:00 to 13:00

Monday to Thursday from 14:00 to 17:15

Friday from 7:00 a 14:15

Warehouse Schedule

Monday to Thursday from 9:00 to 13:00

Monday to Thursday from 14:00 to 17:00

Friday from 8:00 to 14:00

August Schedule

Monday to Friday from 7:00 to 14:15

Closed from 3th to 23th included

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