Selected parts available for online ordering for customers in the USA.

Can't find your part? +1 800-237-7841

Glass Master SG-420

Replacement Parts for Glass Master SG-420 Insulation Machines

DECAL-SG/SG420

The CertainTeed Glass Master SG-420 duct board grooving machine enables fabrication of fiberglass duct systems safely, economically and quickly - 40 to 50 times faster than standard hand grooving techniques.

Glass Master has been part of CertainTeed since 2015 and offers replacement parts and blades. We offer tools and accessories for the Glass Master SG-420, also.

Time for a new machine?

Contact us today to get the right CertainTeed insulation machine for your needs. Call now : +1 800-237-7841

Need help finding your machine or parts ?

Use your mobile device and Google® Lens. ?

Use your mobile device and Google® Lens to visually search for replacement parts for CertainTeed and Unisul insulation machines.
  • Determine if your Google® search app has Google® Lens already embedded in it.
    - Look for the camera icon in your Google® app search box. google lense searchbox
  • If your Google® search app has Lens, select the camera icon and follow the Google® Lens instructions for using the camera on your mobile device to find your CertainTeed insulation machine and/or parts using those from your machine. machine and/or parts using those from your machine.
    - This works best if you are in a well-lit area.
  • If your Google® app does not have Lens embedded, you may be able to download it from your app store.
  • - Select your app store and search for Google® Lens. Find the app with the logo shown here:google lense icon
  • - Once installed on your mobile device, open the Google® Lens app and use your mobile device camera for find the replacement parts you need for your CertainTeed or Unisul insulation machines. Google® provides in-app instructions for use.
Quick Tips for using visual search with your mobile device camera:
  • For best results, scan the serial plate from your machine. It has the model number to help you find the correct parts for your specific machine. Here is a sample one:
    OR
  • Scan the front on your machine.
  • steel lable of machin