A wide range of biocompatible silicone additives to enhance silicone elastomers with color pigmenting, radiopacity or foam-like features


A wide range of biocompatible silicone additives to enhance silicone elastomers with color pigmenting, radiopacity or foam-like features

NuSil® additives give manufacturers simple, precise ways to enhance silicone elastomers used in medical devices by adding color or radiopacity to the base material. Our blowing agents are designed to transform the base material into a foam. The biocompatible additives come in the form of ready-to-use concentrated masterbatches which reduce production cycle times and costly cleaning procedures.

We formulate masterbatches suitable for a variety of fabrication methods, including molding, calendaring, extrusion and injection molding. They come dispersed in a vinyl-functional silicone polymer that crosslinks into the network of platinum-catalyzed silicone systems. Available additives include:

  • Color masterbatches: A simple way to add color to silicone elastomers used in medical devices, our masterbatches eliminate the need for powder pigments. They deliver superior color consistency with no bleed out in the final cured state and no impact on the base material’s physical properties. Custom color matching is available upon request.
  • Radiopaque masterbatches: Our radiopaque additives provide an easy, more precise, method of adding barium sulfate to silicone elastomers that reduces production time and eliminates the need for powders that may contaminate cleanroom environments.
  • Blowing agents: The ammonium bicarbonate masterbatch offers the ability to create a low density, lightweight and flexible silicone foam or sponge from the base material.

Custom formulations tailored to your needs

NuSil has the expertise, processes, and proprietary technology to customize our silicones based on your unique specifications. We leverage our insight into the unique silicone chemistry and material properties to supply off-the-shelf and custom formulations tailored to your process and end-application performance requirements.

Learn more about how we can help you get the products you need.

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Example of pacemaker with silicone components shown

Medical implants

Ideal for silicones that range from low viscosity elastomers to high consistency rubbers, our silicone additives are supported for use in long-term implants (> 29 days).

infant with silicone airway device

General healthcare

Our silicone additives help general healthcare manufacturers get the features that are needed for external equipment, like tubing, as well as short-term implants (< 29 days).

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Ready to move your next innovation forward? NuSil can help.

How can we help you?

Whether you need color or flexible foaming agents, NuSil experts will help you find the right additive for your application.

Avantor®, a Fortune 500 company, is a leading global provider of mission-critical products and services to customers in the biopharma, healthcare, education & government, and advanced technologies & applied materials industries. Our portfolio is used in virtually every stage of the most important research, development and production activities in the industries we serve. Our global footprint enables us to serve more than 300,000 customer locations and gives us extensive access to research laboratories and scientists in more than 180 countries. We set science in motion to create a better world.