Somos® ProtoGen 18420

An easy-to-print photopolymer that produces accurate parts which resist well to chemicals, high temperatures and humidity.

Easy-to-print for a variety of applications

Covestro's Somos® ProtoGen 18420 is an easy-to-print, ABS-like, photopolymer that produces accurate parts ideal for general purpose applications. It offers superior chemical resistance, a wide processing latitude and excellent tolerance to a broad range of temperatures and humidity, both during and after the build.


  • Medical, electronic, aerospace, automotive market applications
  • Applications that demand RTV patterns
  • Durable concept models
  • High-temperature fluid flow analysis
  • Functional prototypes requiring heat and humidity resistance
  • High-detail parts
  • Low volume connectors and harnesses for electronics

Product Features

  • Tune the properties of the part to fit your application needs 
  • Fast, easy processing & finishing 
  • Highly accurate

How customers use our material

Printing a 12-foot sculpture with intricate details

When Oakley requested a sculpture be made for Covent Garden, they turned to Dinsmore to 3D print a 12-foot sculpture of an angel. 

Rapid prototyping used to create model of Chicago’s skyline

Covestro 3D printed a large-scale model of the city of Chicago on display at the Chicago Architecture Center.

How can we help?

Get in touch with our experts to discuss how Covestro can help you tap into the full potential of additive manufacturing.