low viscosity silicone elastomer poured into flask

Low viscosity elastomers

NuSil® low viscosity elastomers from Avantor® are flowable silicones that are ideal for low-pressure molding processes, as well as providing an effective material for encapsulating devices such as electronics.

The NuSil line of low viscosity elastomers (LVEs) are ideal for molding or casting a part, as well as encapsulating components in a device. They also offer a lower viscosity alternative to HCRs and LSRs for parts production.

NuSil LVEs are typically two-part, platinum-catalyzed, addition cured silicones that can be designed with an adjustable cure schedule to accommodate both low- and high-temperature curing. Because LVEs are flowable and self-leveling, they can be poured directly into molds or forms and can also be low-pressure molded into parts.

NuSil low viscosity elastomers are available in many optically clear options and can be supplied in convenient cartridges that allow for direct application into molds or forms for potting, eliminating the need for separate mixing and de-airing steps.

Customization mastered

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

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

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Interior NuSil silicone production technology

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Example of pacemaker with silicone components shown

Medical implants

NuSil’s low viscosity elastomers can be used to low-pressure mold long-term (> 29 days) implantable medical devices or parts. LVEs can also be used to pot or encapsulate medical electronics or other components used in medical devices.

infant with silicone airway device

General healthcare

NuSil medical-grade LVEs can be used to low-pressure mold a wide range of components for medical devices, such as lenses or to backfill a void, encapsulate a device or pot an electronic component.

military aircraft in flight

Aviation & defense

NuSil LVEs include a range of optically clear products for use in avionics and power electronics that operate or assist in aircraft functionality, specifically encapsulating a device, backfilling a void and potting electronic components.

Children using large digital touchscreen display

Optoelectronics & electronics

NuSil LVEs include many optically clear options with a wide range of refractive indices for applications such as displays. LVEs also provide an excellent option for encapsulating and protecting sensitive electronics.

Related Content

Browse additional resources related to low viscosity silicone elastomers.

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How can we help you?

Whether you’re using NuSil LVEs to low-pressure mold parts, or you need an efficient material to encapsulate electronics, our experts will help you determine the right silicone 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. One of our greatest strengths comes from having a global infrastructure that is strategically located to support the needs of our customers. Our global footprint enables us to serve more than 225,000 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.