Super Spray - 8 Oz

$23.95 USD
Item# 7404
In Stock Usually ships in 1 to 2 business days.

  • For kiln fired glass
  • Prevents surface devitrification
  • 99.9% lead free
  • Proven safe for food bearing surfaces
  • Fire to 1300-1700° F
  • Gives a glossy glass like finish

Product Description

Overglaze for kiln fired glass projects is applied prior to firing to prevent surface devitrification. Super Spray can be used on iridescent surfaces and it will not discolor reds, oranges or other sensitive colors. 99.9% lead free. Proven safe for food bearing surfaces. 8 oz bottle.


  1. Shake well before using.
  2. Spray or brush a liberal uniform application onto exposed pieces of glass before firing.
  3. Fire to 1300-1700° F for a glossy, glass like shine.

Customer Reviews

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5 out of 5 stars
  •   Smooth
By on
Pros : makes glass so shiny, even covers previous fires devit
Cons :
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7 of 7 people found this review helpful
5 out of 5 stars
  •   Works Great
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Pros : Great for preventing and reversing devitrification
Cons :
Other Thoughts : I usually use this stuff on devit-prone areas, and my work comes out great every time.
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3 of 3 people found this review helpful
5 out of 5 stars
  •   Super Spray
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Pros : This should be renamed Magic Spray because the ease with which it reverses devit is pure magic in my opinion. I vow never to be without this incredible product. For me it works much better than borax solution.
Cons : The only thing I can think of is that in order to reverse devit you must go above 1300. If devit happens during tack fuse or slumping, taking the piece back up to 1300 can result in some change.
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6 of 6 people found this review helpful

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Related Content
Jul 02, 2010
Have you ever noticed ugly, hazy, gray coloration around the edges of your full-fused designs? This is especially noticeable when placing darker colored or iridized glass designs on a lighter colored background but it can happen with any color combination. This phenomenon is known as edge-devit (devitrification) and is most often caused by grinding the glass edges prior to fusing. This also occurs when using a diamond blade saw to cut your glass. One glass manufacturer explains it this way; The roughened edges in the ground area create thousands of tiny points from which crystal growth can easily propagate. The best solution is to score and break the glass as close to your final shape as possible to minimize grinding (or better yet avoid it altogether). If you must grind you could try using a light coat of clear overglaze (i.e. Fusemaster Super Spray) on the ground areas to