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Liquid silicones (LSR)

Liquid silicones are usually 2-component systems consisting of the platinum catalyst (component A) and the Si-H crosslinker (component B), which are crosslinked exclusively by addition. Due to short-chain linear polysiloxanes with a viscosity of approx. 5-500 Pa-s and a relatively low filler content (max. 30%), liquid silicones have a pourable to pasty consistency and are mainly processed by injection molding.


Solid silicones are copolymers of dimethylsiloxanes (main chain) and isolated vinylmethylsiloxanes (functional group). Due to their low intermolecular interaction, they have a soft, pasty consistency. With a viscosity of 10,000 to 50,000 Pa-s, solid silicones are easy to process at room temperature.

Thanks to its low viscosity, LSR can be applied to the cable at room temperature. For this purpose, the cables are fed horizontally or vertically through the LSR and then crosslinked via heat input. Unlike HTV, LSR does not have to be rolled or compounded beforehand. Both components arrive in different containers and are processed directly. Due to the addition crosslinking by means of a platinum catalyst, the crosslinking is residue-free and halogen-free, which makes LSR very popular for applications in medicine.