SentryGlas® Interlayer

SentryGlas® is Widely Used For:

  • Hurricane or storm glazing
  • Transportation glazing, architectural
    and structural glazing
  • Butt joint exterior glazing—enclosures, podiums
  • Bolted and point supported glass—facades, curtainwalls
  • Exposed edge glass—balusters, edge wings
  • Ballistic and forced entry glass—ASTM,
    UL, and NIJ constructions
  • Structural load bearing glass—stairs,
    flooring, walkways, canopies

Performance Characteristics:

  • Strength
  • Clarity
  • Security
  • Weathering
  • Lighter weight constructions

Common Brands:

  • SentryGlas®

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SentryGlas® Interlayer

Structural interlayer material for storm, blast, ballistic, and single-point supported glass applications

Kuraray SentryGlas® (SG5000) and SentryGlas® XTRA™ (SGX™) (SG6000) are interlayers designed to be laminated between two or multiple layers of glass. Originally developed for the security and hurricane glazing markets, SentryGlas® interlayers are now being specified by architects and engineers for  applications where high performance glass is required.

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SHEET Dimensions:
48 in x 96 in – 84 in x 144 in
0.89 mm (35 mil), 1.52 mm
(60 mil), 2.28 mm (90 mil),
2.53 mm (100 mil)
COLOR Sheet:
Clear (Yellowness-Index (ZID) of <2.5)

SentryGlas® Interlayer can be ordered as 'cut-to-size', 'cut-to-fit' or 'cut-to-form' sheet, which means that none of the material is wasted. 

SentryGlas® Interlayer Properties and Material Options

SentryGlas® (SG5000)– interlayer is stronger and more rigid than conventional laminating materials, creating safety glass that protects against storms, impacts, and blasts. The interlayers become an engineered component within the glass, holding more weight, so the glass can serve as a more active structural element in the building envelope, increasing framing system design freedom. SentryGlas® is less susceptible to moisture, weathering, and edge defects than other interlayers.

SentryGlas® XTRA™ (SGX™) (SG6000)– interlayer sheet offers improved adhesion to the air side of glass without requiring an adhesion promoter. SGX™ optical performance and haze formation are much less sensitive to the autoclave cooling rate. The lower haze makes producing very thick laminates of outstanding optical quality easy to achieve. SGX™ complies with global safety glazing codes ANSI Z97.1, EN14449, EN12543, EN12600, EN356 and Safety Glazing Certification Council (SGCC). Properly laminated and installed, SGX™ laminates of 2.53 mm caliper have been tested and pass the large missile impact test per ASTM E 1996.

Structural Glazing– Structural interlayer helps architects and glazed building system manufacturers meet society’s need for greater security, energy efficiency, noise reduction, and safety requirements. It helps architects do more with less, creating innovative new spaces, while providing greater protection for occupants. SentryGlas® improves longterm weather resistance of laminated glass systems.

Safety & Security Glazing– Interlayers are used in a broad range of safety and security applications to offer protection. When designing security glass for bullet and blast resistant buildings or vehicles, SentryGlas® will help let light in and keep trouble out.

Decorative Glazing– There are many ways to decorate laminated safety glass using SentryGlas®  interlayer by embedding a metal mesh or metallized PET fabric or by printing on a PVB interlayer.

Transportation– SentryGlas® interlayers help build lighter-weight, more fuel-efficient vehicles that withstand harsh climate conditions while ensuring passenger safety. 

Tech Tip– SentryGlas® ionoplast interlayers help create safety glass that protects against bigger storms, larger impacts and more powerful blasts. SentryGlas® is 5 times tougher, up to 100 times stiffer than conventional laminating materials. See the technical bulletin on ballistics-resistant glazing compositions.


Typical properties of SentryGlas® interlayer
Haze % ASTM D1003 <2 <1
Impact test   ANSI Z97.1, 0.89 mm
(35 mil)/3mm
annealed glass
  Class A Category II – Pass
Class B Category I – Pass
Impact test   EN12600, 0.76 mm
(30 mil)/3mm
annealed glass
  Category 1B1 - Pass
Impact test   EN356, 0.76 mm
(30 mil)/3mm
annealed glass
  Category P1A - Pass
Impact test
m (ft) ANSI Z26.1,
227 g, (0.5 lb)
>9.14 (>30)  
Boil test
2 hr
  ANSI Z26.1 No defects  
Bake test
2 hr/100°C
  ANSI Z26.1 No defects  
Young's modulus Mpa (kpsi) D5026 300 (43.5)  
Tear strength MJ/m3 (ft lb/in3) D638 50 (604)  
Tensile strength Mpa (kpsi) D638 34.5 (5.0) 43.5 (6.3)
Elongation % D638 400 320
Density g/cm3 (lb/in3) D792 0.95 (0.0343) 0.95 (0.0343)
Flex modulus
23°C (73°F)
Mpa (kpsi) D790 345 (50)  
Heat deflection temperature
(HDT) @ 0.46 Mpa
°C (°F) D648 43 (110) 37 (99)
Melting point °C (°F) (DSC) 94 (201)  
Coefficient of thermal expansion
(-20°C to 32°C)
10-3 cm/cm °C x 10-5 D696 10 10
Thermal conductivity W/M-K
(BTU-in/hr-ft2 °F)
  0.246 (1.71)  

The data provided fall within the normal range of product properties and relate to the specific material designated; these data may not be valid for such material used in combination with any other materials or additives or in any process, unless expressly indicated otherwise. The data provided should not be used to establish specification limits or used alone as the basis of design; they are not intended to substitute for any testing you may need to conduct to determine for yourself the suitability of a specific material for your particular purposes. Since Kuraray cannot anticipate all variations in actual end-use conditions, Kuraray make no warranties and assume no liability in connection with any use of this information. Please ask your Curbell Plastics representative for more specific information about SentryGlas® Interlayer and SentryGlas® XTRA™ Interlayer.

Explore the physical, mechanical, thermal, electrical, and optical properties of SentryGlas® interlayer.

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