Unisub 3.75" Square Sublimation Hardboard Coaster with Cork Back

SKU: U5677-5

Quantity Per Pack: 5 Pieces
Sale price$10.95 USD

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Why Choose HeatPressNation?

With over 15 years of experience, HeatPressNation has established itself as the trusted industry leader in heat transfer solutions, earning the confidence of thousands of satisfied customers.


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Unisub sublimation coasters make great gifts or add a fine unique touch as décor. Designed using hardboard with a gloss white sublimation transfer surface for optimal color vibrancy. Hardboard allows you to transfer images quicker making production a breeze. Impress your friends, family, or co-workers. Great for clubs, businesses, or home and holiday occasions.


*Product may have a protective film over the sublimation area, peel before application.*



  • Size: 3.75" W x 3.75" H x .125" D Square
  • Pieces: 5 or 40
  • Substrate: Hardboard
  • Finish: White Gloss
  • Coaster has cork backing to protect furniture surfaces

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Application Instructions

  • Recommended Heat Press: Flat press
  • Prepress: 20 seconds with the top facing up and covered with a Pro Grade Non Stick Sheet. Allow the substrate to fully cool prior to attempting your sublimation transfer. This will ensure optimal quality transfer of your design.
  • Time: 60 - 70 seconds depending on artwork
  • Temperature: 400° F (204° Celsius)
  • Pressure: Medium pressure

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Customer Reviews

Based on 42 reviews
Darla Akers
good quality

very nice blanks. I have gotten them from a couple other places but these are thicker. they sub very well and very pleased.

3.75" Square Hardboard Coasters

First time ordering these coasters from HPN and it definitely won't be the last. They sub extremely well and they don't warp. The color was amazing.

These Coasters Are Great

They are very easy to use, and they sublimate beautifully. They are fantastic and I will be getting a lot more.

Jennifer Selle
Love these!

I have ordered several times and will continue to order. The only issues have been operator error. Great product.

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