silicone adhesive being applied to a surface

Adhesives and Sealants

NuSil® high-purity silicone adhesives and sealants from Avantor® provide strong bonds for the most demanding applications, including medical devices and space craft.

Industry-leading silicone adhesives and sealants

Our line of NuSil® high-performance silicone adhesives and sealants are formulated to meet your needs, whether for biocompatible silicone adhesives, medical-grade silicones, or sealants for use in extreme temperatures.

We work with you to help you find the correct product by balancing all your needs, such as manufacturing throughput, device performance, reliability, and durability. Whether you need a biocompatible or ultra-low outgassing silicone or something in between, our experts will guide you to the best choice.

NuSil offers silicone adhesives to boost manufacturing throughout and increase performance:

  • One-part room temperature vulcanized (RTV) silicone adhesives: Our one-part moisture cure formulations do not require mixing prior to use. They are ideal for use with temperature-sensitive components.
  • Two-part RTV, or heat-curing silicone adhesives: These platinum-catalyzed formulations rapidly cure without byproducts or leaving groups. Two-part RTV silicones are ideal for use where you want faster throughput.
  • Dispersed silicone adhesives: NuSil dispersed adhesives create a thin, uniform layer. Their low viscosity lets them easily flow into hard-to-reach areas.
  • Film adhesives & tapes: Our double-sided tapes and film adhesives are an alternative to traditional liquid adhesives. They are available in sheet form with release liners and an internal structural support layer. These adhesives offer reliable bond line control in a peel-and-stick format.
  • Pressure-sensitive adhesives (PSAs): This solvent-based, removable adhesive is non-curing but forms a strong bond when pressure is applied.
  • Soft silicone adhesives (SSAs): Our SSAs provide permeability, protection, and atraumatic removal from human skin. They are ideal for wound care, scar management, and wearable monitoring devices.

Our silicone portfolio also includes primers to enhance adhesion.

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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Interior NuSil silicone production technology

Product Finder: Find NuSil silicone adhesives & sealants for your application

Medical implants

Manufacturers rely on NuSil silicone adhesives for a wide range of medical device applications, from cochlear implants and pacemakers to gastric balloons. Our adhesives for long-term implantable devices (>29 days) help create efficiencies in the production process by reducing manufacturing time and improving device performance.

infant with silicone airway device

General healthcare

Biocompatible silicone adhesives from NuSil are ideal for assembling medical devices for short-term use in the body (<29 days) or for external applications such as wound care. Our off-the-shelf and customized products are supplied with the regulatory support needed to bring your product to market.

Curiosity Mars rover incorporating silicone protective materials


NuSil low and ultra-low outgassing adhesives are specifically designed to increase manufacturing throughput while reliably binding to many substrates, including metals, plastics, glass and polyimide. Our industry-leading, space-grade tapes and film adhesives offer less touch time and faster cure.

military aircraft in flight

Aviation and defense

From metals to glass to plastics, NuSil silicone solutions create a reliable bond suitable for mission-critical applications in commercial aviation and defense applications. We offer off-the-shelf and custom formulations to meet specific requirements, such as size, thickness or adhesion to specific substrates.

Children using large digital touchscreen display

Optoelectronics and electronics

We offer an extensive range of optically clear, reflective index (RI) silicone matching adhesives. NuSil advanced technologies can help manufacturers achieve improved device performance with longer operating lives.

Additional information about silicone adhesives.

NuSil® by Avantor is constantly adding to its comprehensive library of resources covering its complete line of high-purity silicone adhesives and sealants.


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Silicone adhesives

We offer a wide range of NuSil® brand silicone adhesives and silicone primers to improve the productivity of medical device manufacturing. See the difference we can make.

Customer support

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

How can we help you?

From medical adhesives for wound care to high-temperature silicone adhesive products, NuSil experts will help you find the right product 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.