Insulated Glass Units

Ray-Bar specialty insulated glass units (IGU) are available in a wide variety of sizes, glass compositions, and thicknesses to achieve a range of requirements such as radiation shielding, fire rating, mini blind IGUs, thermal insulation, ballistic resistance, and more.

Click here for a PDF detail of our Internal Mini Blind IGUs

A few of the types of glass compositions offered are: 

Internal Mini Blinds IGUs

Mini Blind Blade Color Options


Blind color: Stock colors are White (S102), Cream (S149), and Silver (S157)

Custom colors (12 week lead time): Pale Yellow (S106), Beige (S125), Pale green (S130), Pale blue (S142), Pale grey (S155), and Bright silver (S156)

Low-E IGUs

X-Ray Lead Glass can be paired with many types of glass such as

Ballistic glass + Any other customer-specified glass

Solarban + Fire rated glass

 Tempered glass

Internal Mini Blind IGUs

Internal Mini Blind IGU

Internal Mini Blind IGUs assembled and permanently sealed within the dual glazing cavity. Once sealed in this dust free environment, the blinds always appear new and require no cleaning, unlike external blind systems.

This is an important feature to be considered at the design stage of between the glass blinds, where formal specification and elegance are required.

Solar Energy is made up of visible light (53.5%), infra-red (45%) and a small amount of UV radiation.

The amount of visible light that passes through a double glazed Mini Blind IGU can vary from 82% to 1%.  This ability of the system allows it a universal application to many varied activities:

Internal Mini Blind IGUs also control the amount of infra-red energy passing through the window and consequently reduces the internal heating effect, thus reducing the cost of expensive air conditioning.  By offering some control over the quantity of UV radiation, Mini Blind IGUs can reduce the chromatic deterioration which occurs to furnishing and fabrics.

Glass is a product that we consider to be static and inflexible.  However, in a sealed unit, the internal pressure can vary according to the weather conditions (i.e. temperature and altitude).  We have taken this into consideration to allow for the correct operation of the integral blinds regardless of the weather conditions.

We offer a wide variety of Mini Blind colors, unit thicknesses, glass compositions, sizes, glass thickness, spacer materials, and spacer thicknesses.

Minimum size is 12" x 12" & Max size is 78" x 102"

Contact Ray-Bar Engineering for more information about Internal Mini Blind IGUs by emailing us at or by calling us at (800) 444-9729.

X-Ray Lead Glass IGUs

Fire Rated X-RAY Glass IGU

X-Ray Lead Glass IGUs are dual-glazed with x-ray lead glass and the opposing glass of the customers choice. These are ideal for unique specialty applications or meeting multiple requirements such as fire ratings (including hose stream tests), positive pressure, insulation values, energy efficiency, security, bullet resistance, exterior application, or high radiation conditions.

This product is also available as X-Ray Safety Glass which meets ANSI Z.97.1 and CPSC 16 CFR 1201 Cat 2 requirements for impact resistance.

Click here for a PDF of Fire Rated IGUs

Contact us for additional information about Internal X-Ray Lead Glass IGUs.

FireLite IGUs

Firelite IGUs and are available with the following opposing glass options

FireLite is available is multiple fire ratings up to 3 hours in doors (limited to 100 sq. in.) or 90 minutes in walls (up to 2,627 sq. in.) or up to 90 minutes in non-temp rise doors (up to 2,034 sq. in). These are also available in 60, 45, and 20 minute ratings with higher size capabilities. These units pass hose stream and positive pressure tests and are UL listed.

These IGUs are typically 1" and increase depending on the opposing glass composition. These are available in impact resistant safety glass meeting ANSI Z97.1 and CPSC 16CFR1201 Cat I and II.

Fire Rated X-Ray Lead Glass IGUs

Fire rated x-ray lead glass insulated glass units are available with fire ratings up to 180 minutes in doors (with size limits) and 90 minutes in walls, able to meet any lead equivalency that your project requires. The minimum thickness is 1" and will increase depending on lead shielding value requirements. These units are available in approximately 3 weeks. We also offer lead lined fire rated frames to accept the units for wall or door applications.

You can request a quote by emailing us at or by calling us at (800) 444-9729

Ballistic + Fire Rated IGUs

We now offer several products for applications that require bullet resistance and a fire rating. Pyrostop is a good option up to 2 hour fire rating and UL 752 Level 3 bullet resistance.

Alternatively, we have other options for higher bullet resistance and 

fire ratings.

For more info on bullet resistant levels, product data, or to request a quote please email or by call us at (800) 444-9729


Pyrostop is a versatile and durable glazing product that can achieve high fire ratings, safety rating, and UL 752 level 3 bullet resistance. It is a multi laminated product using low-iron, colorless, high light transmission glass. Pyrostop is available in many different thicknesses and fire ratings up to 2 hour with hose stream test. It protects against fire, smoke, radiant and conductive heat transfer and is UL listed, classified, and permanently labeled. There are options for interior, exterior, door, or wall applications. Being a laminated product, it is naturally safety rated and meets Ansi Z97.1 and CPSC 16 CFR 1201 Cat II requirements for impact resistance.

For more info you can request a quote for Pyrostop by emailing, or by calling us at (800) 444-9729.