There are basically three types of silicone, silicone oils, silicone rubbers and silicone resins, which in turn comprise more than a thousand other silicone semi-finished products.

At Merefsa We work with silicone rubbers for compression molding, transfer molding, horizontal extrusion (HTV silicones) and casting (LSR silicones).

The durability of a silicone product will always depend on the working conditions to which it is subjected (temperature, mechanical stress, chemical resistance, etc.).

Silicones, once vulcanized and converted In final product, they have no expiration date. In its original packaging, we can ensure its perfect state of preservation for a period exceeding 10 years.

To be able to quote the cost of a product, we need to know:

• Number of meters or quantity needed.
• Plan, sketch or sample of the product to be manufactured .
• Working temperature range that the material will have to withstand.
• Food specifications if applicable.
• Mechanical and chemical working conditions for its application.

Some yes and others no.

To the base of the silicone (a kind of paste) we add a catalyst to vulcanize and become a finished product. Basically we use three types of catalysts:

• Platinum salt catalysts: they make the silicone enjoy a high transparency and do not yellow over time or sun exposure. They are suitable for food contact.
• Peroxides catalysts of the DIACYL family: they are the least transparent and yellow over time, but are suitable for food contact.
• Peroxides catalysts of the DIALKYL family: they transparent and yellow little over time, basically for industrial use.

No, silicone, although yellowing, still retains all its physical and chemical properties. We can continue to use it until it breaks or stops making the use we expect.

Those that are necessary. In Merefsa we can manufacture any RAL color from 25Kg of product. Our standard is translucent silicone in compact silicones and white in spongy silicones.

In addition, we can manufacture luminescent, fluorescent and metallic colors.

Our standard is a silicone base that supports from -50 ºC to + 200 ºC, although we have other bases that can support -90 ºC (PVMQ) and even + 315 ºC (THT). Our silicone bases are guaranteed by the manufacturer of raw material for continuous use for a minimum of 1,000 hours.

Our standard in compact silicone is 60° Shore A (± 5), and in sponge 0.25 gr / cm³.

In addition, our range of hardnesses in production of compact silicones ranges from 25° to 85° Shore A and in spongy silicones from 0.25 to 0.8 gr / cm³.

Yes. Although the main activity is the manufacture of finished products, we also market additive bases, ready for use.

Yes, for our standard compact extrusion silicones, assuming the customer a surcharge of 300€ per production stop, both in translucent and colored silicones, with hardnesses of 40 to 80Sh.