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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.

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


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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 Castelló 9, ( 08830) Sant boi de Llobregat, 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 rgpd@merefsa.com, or by sending a registered letter to the indicated address.


Castello, 9 08830 Sant Boi de Llobregat

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 to 14:15

Warehouse Schedule

Monday to Friday from 9:00 to 14:00

Store closed from 26/03 to 01/04

Summer Intensive Schedule

From June 20th to September 13th from 07:00 to 14:15

Easter Week Vacation

Closed from 27/03/2024 to 01/04/2024

Store closed from 26/03 to 01/04

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