Quality Borosilicate, Quartz & Cobalt Blue Flat Glass In Stock

Borosilicate Glass available in custom size and can be cut to your specification 


Plain Borosilicate - Clear 
Good for normal service where one surface is heated to a maximum temperature of 446°F (230°C), using 1/4" or thicker glass. The temperature difference between ambient and process should not exceed 150°F.

Tempered Borosilicate - Clear
Recommended for use where higher pressures are required than can be obtained with Annealed Borosilicate. Maximum service temperature is 500°F (260°C). No corrosion to surface, nor severe chill can be tolerated. 

Cobalt Blue Borosilicate Furnace Glass - Blue
Used to reduce glare when observing flame, smoke, and ash intensity in power plants and marine boilers. Thickness up to 1/4". ( Note Cobalt Bue Vicor) No Longer Made. 

Fused Quartz - Clear


For industrial and laboratory applications. Can be used continuously at 1742°F (950°C). Commercial Grade is standard. Optical Grade is available. 

  • Intermediate sizes under 144 sq. inches take the price of the next larger size.
  • On 1/16, 1/8, 3/16, and 1/4 inches, the price for ground edges will be quoted on request.


$25.00 Minimum Order


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