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Sof-Tray® Classic Sheets

Sheet Material for Vacuum-Forming of Trays
About Quantity Discounts

Return Policy Items returned within 30 days of purchase with a return authorization number on the outside and inside of the return box will be credited 100%. See full details

Product Details

Sof-Tray Classic Sheets are specifically designed to create custom-made whitening trays for patients interested in take-home whitening treatments.

  • Available in Regular, Medium, and Heavy thicknesses
  • Select Regular (0.035˝) for most bleaching trays
  • Select Medium (0.060˝) for bruxers’ bleaching trays
  • Select Heavy (0.080˝) for severe bruxers or as a TMJ appliance

Indications for Use

Sof-Tray Classic Sheets

​Sof-Tray Classic Sheets are indicated for use in bleaching tray fabrication with a vacuum former.


Sof-Tray® Classic Sheets

Forming to the Mold

​The Sof-Tray Classic Sheet is heated with the vacuum former prior to tray formation.

Technical Details

The Right Thickness for Any Patient

​Sof-Tray Classic Sheets come in two different thicknesses, so you can find the one just right for any patient. Most patients will require the Regular size, but if you have patients with TMJ issues or those who grind their teeth but still want to whiten overnight, you can use the Medium sheets or Heavy sheets.

Soft and Flexible

​Sof-Tray Classic Sheets are soft and flexible, which means they’re easy to trim using the Ultradent® Utility Vinyl Cutters and the Ultradent® Ultra-Trim Scalloping Scissors. And they’re extremely comfortable for the patient!

Ideal for Use with the UtraVac™ Vacuum Former

​Sof-Tray Classic Sheets fit perfectly in the UltraVac Vacuum Former. The heating element of the UltraVac efficiently heats the Sof-Tray material to the ideal softness, and the vacuum element effectively forms the heated material precisely around the stone model.


Tray Fabrication Step by Step

  1. 1

    ​Pour impression with fast-set plaster or dental stone. Pour alginate shortly after making impression to ensure accuracy. Trimming is less work if quantity of stone is kept to a minimum.

  2. 2

    ​For reservoir spaces, apply Ultradent LC Block-Out Resin approximately 0.5mm thick onto the labial surfaces. Stay about 1.5mm from gingival line. Do not extend onto incisal edges or occlusal surfaces.

  3. 3

    ​With vacuum former, heat tray material (Sof-Tray® Classic Sheets) until it sags approximately 1 inch. Adapt plastic over mold. Cool and remove model.

  4. 4

    ​Use Ultradent® Ultra-Trim Scalloping Scissors to precisely trim tray 0.25 to 0.33mm occlusal from gingival margin.

  5. 5

    ​Return tray to model; check tray extensions.

  6. 6

    ​Gently flame polish edges one quadrant at a time.

  7. 7

    ​Finished custom tray, precisely trimmed, is now ready for final adaptation in the patient’s mouth.


  • How many Sof-Tray Classic Sheets come in a pack?

    ​Sof-Tray Regular Sheets come in packs of 25 sheets. The Medium and Heavy sheets come in packs of 20 sheets.

  • How long do I have to wait for the tray material to cool before trimming?

    It’s best to allow the tray to fully cool before removing it from the vacuum former. Otherwise, you will likely distort the tray and have to start the process over.

  • Is there a specific way I should place the Sof-Tray sheets in the UltraVac?

    Yes. It’s best to place the sheet in the vacuum former with the faint lines in the tray material parallel with the front of the vacuum former.

  • How long do I heat the Sof-Tray Classic sheets?

    ​The duration of time will vary depending on your equipment and the thickness of the material, but look for the sagging or drooping shown in the image above (about 1–1.5 inches).