High tear silicone


In the centrifugal casting sector, there has always been a great dilemma with silicone moulds. The higher the heat resistance IS, the lower mechanical resistance it has, and the higher the mechanical resistance, the lower the heat resistance.

At CONIEX we have always tried to find a balance between both properties with the aim of obtaining moulds that are profitable and resistant to the different production processes of centrifugal casting:

  1. In low-temperature vulcanisation moulds, in parts with a lot of counter-exit, tears or breaks can occur in part of the part.
  2. Pewter moulds, although they already have high mechanical resistance, in parts with a lot of counter-exit can produce tears or breaks in part of the part
  3. The moulds for Zamak with high thermal resistance, however, suffer from sufficient mechanical resistance to avoid tearing or breakage in depending on which parts or parts of these parts: interiors, edges, fretwork, etc.

To avoid these breakages, CONIEX, S.A.’s R+D+I laboratory has developed a special silicone with high resistance to tearing, to be used as false parts and in small quantities, in the area of the mould where we know these critical breakage points occur. With this, the life of the mould is extended and it will reach its productive end without anticipated breakages.


  • Extraordinary resistance to tearing
  • Great flexibility
  • High fidelity reproduction

How is silicone used for tearing?

  • Before handling the HIGH TEAR SILICONE, make sure that both hands and the table and utensils to be used are perfectly clean and free of grease or varnish.
  • Take small portions of silicone and knead them manually before inserting the pieces in the critical areas of each piece. It is important not to dirty the areas to be joined with talcum powder, as it will lose adhesion to the mould.
  • To improve the adherence between the HIGH TEAR SILICONE and the mould, it is convenient to clean and wet the parts to be “hooked” with a solvent that, once it has evaporated, will have generated a sticky surface on both silicones that will allow the union.
  • Introduce the pieces as usual and fill the mould with the pieces already perfectly placed and joined.

We have HIGH TEAR SILICON for low-temperature vulcanization, between 90º and 120º and HIGH TEAR SILICON for PEWTER and ZAMAK, suitable for moulds that vulcanize between 160º and 180º.





















Our Technical Department is at your disposal for any question you may have.

For more information, you can consult the rest of the CONIEX pages.




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