Platinum Silicone Gaskets

Silicone is widely used in pharmaceutical applications for two major reasons. First, and foremost, is safety. Silicone does not contain plasticizes or other additives that could leach into a drug product and cause toxicological issues. Second, silicone is highly flexible and tear-resistant, making it a good choice for sealing fluids in down stream processes.

In order to make Silicone gaskets there are two cure system options with silicones, however, that produce materials with different characteristics, whose impact should be considered before selection. Silicone materials may be cured using free radical (peroxide) or addition (platinum) cure mechanisms.

Platinum-cured and peroxide-cured silicone gaskets can both be made to USP Class VI and other industry specifications, but a platinum-cured gasket has a higher purity and lower leach ability than peroxide-cured silicone.

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Platinum vs Peroxide

Peroxide-cured gaskets contains a small residue of 2,4 DCBA (dichlorobenzoic acid) as a by-product of the curing reaction, platinum-cured gaskets has no 2,4 DCBA residues, its only by-product is H2O.  In some critical bioprocesses the small amount of DCBA might have a negative impact on the media that is made. The relative value and impact of these characteristics should be evaluated carefully when selecting the silicone type for fluid handling applications.

Available Compounds

CMD-1012  Compression Moulding compound Translucent

CMD-1065  Compression Moulding compound White

CMD-1071  Liquid Injection Moulding compound Transparent

CMD-1084  Liquid Injection Moulding compound White

Compound data sheets 


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