One part, neutral curing high performance silicone system for bonding, sealing & coating for medical devices

Key Features

  • Meets USP Class VI requirements
  • Passes ISO 10993-5 testing
  • Fast curing
  • Paste consistency
  • Excellent performance profile
  • Good sterilization resistance

Product Description

MasterSil 912Med is a specially formulated RTV silicone system for bonding, sealing and coating primarily for medical devices. It is a non-corrosive, neutral type curing system with a paste viscosity. It passes both USP Class VI testing and ISO cytotoxicity standards. Upon curing, it bonds well to a wide variety of substrates, including metals, composites, ceramics, glass as well as many rubbers and plastics. MasterSil 912Med can withstand highly rigorous thermal cycling as well as thermal and mechanical shock. Similar to other one part silicones, the curing mechanism is based on the humidity level. The higher the humidity, the faster the cure and thinner sections cure more quickly than thicker ones. MasterSil 912Med is a faster curing system with a tack free time of 15-30 minutes, depending upon the variables mentioned previously. It resists many kinds of sterilization including gamma and other types of radiation, EtO and some types of liquid sterilants. The service temperature range extends from -75°F to +400°F. One particularly useful product property is its ability to adhere well to silicone substrates. MasterSil 912Med can be used in a wide array of medical device applications where the unique properties of a silicone are desirable. It should be emphasized that for biocompatibility testing, a full cure of at least 7 days is recommended.

Industrial Certifications

USP Class VI Medical

ISO 10993-5 for Cytotoxicity

Meets EU Directive 2015/863



MasterSil 912Med is available is various sizes and units to accommodate customer's needs.

Case Studies

A research team from Cold Spring Harbor Laboratory worked on new Neuropixels probes that enable simultaneous recording of hundreds of neurons with remarkably high signal to noise in freely moving mice. They used biocompatible silicone MasterSil 912Med for adapting Neuropixels probes for chronically-implanted experiments. Here is a quote from their work:

“Mounting the probe. ... Using a needle, we applied a medical-grade clear silicon adhesive, MasterSil 912Med, to the base of the shank.”1

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