3
VHB
Tape Structural Glazing
Technical Guide
3
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pg_0003
VHB™ Tape Structural Glazing Technical Guide
Table of Contents
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pg_0005
VHB™ Tape Structural Glazing Technical Guide
Introduction
Technical Support Center
Be sure to ask for VHB structural glazing technical or marketing
support.
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pg_0007
Product Portfolio
3M™ VHB™ Structural Glazing Tapes
3M™ VHB™ Structural Glazing Tape G23F (Worldwide)
Construction VHB™ G23F:
Performance Properties:
pg_0008
3M™ VHB™ Structural Cladding Tape VHB™ W 20 F (Europe)
Construction:
Performance Properties:
3M™ VHB™ Structural Glazing Tape 4972 (South America)
Construction:
Performance Properties:
pg_0009
Adhesion Promoters
3M Silane Primer
3M™ Primer 94
Abrasion Pads
3M™ Scotch-Brite® 7447
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Introduction and Background
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3M™ VHB™ Structural Glazing Tape Properties and
Performance
Composition
Outdoor Durability
pg_0012
Moisture and Solvent Resistance
Note:
Structural Performance Tests
pg_0013
Test Sequence Test Method
3M™ VHB™ SGT
4972
Laminated Gl ass
One-Part Structural
Silicone
DGU
One-Part Structural
Silicone
8mm Tempered
3M™ VHB™ SGT
G23F
DGU
3M™ VHB™ SGT
G23F
8mm Tempered
Air Infiltration
ASTM E283 (at
+0.3kPa)
No air leakage from panel No air leakage from panel No air leakage from panel No air leakage from panel No air leakage from panel
Water
Penetration
ASTM E331
(at +0.72kPa)
No water leakage No water leakage No water leakage No water leakage No water leakage
Temperature
Cycling
20 cycles -
25
0
C to 70
0
C
Subjected to 40 cycles
Air Infiltration
ASTM E283 (at
+0.3kPa)
No air leakage from panel No air leakage from panel No air leakage from panel No air leakage from panel No air leakage from panel
Water
Penetration
ASTM E331
(at +0.72kPa)
No water leakage No water leakage No water leakage No water leakage No water leakage
Windload
Structural
ASTM E330 -
25
0
C, 32
0
C, 70
0
C
(hold for 1 minute)
+/-2.9kPa
(60psf, 155 mph)
Air Infiltration
ASTM E283 (at
+0.3kPa)
No air leakage from panel No air leakage from panel No air leakage from panel
No air leakage but
presence of water
condensation seen on
spacer tape
No air leakage from panel
Windload
Structural Max.
ASTM E330
32
0
C (hold 10 sec)
+/- 6kPa (125psf,
225 mph)
+/- 6kPa (125psf,
225 mph)
+/- 8kPa
(167psf, 260 mph)
+/- 8kPa
(167psf, 260 mph)
+/- 8kPa
(167psf, 260 mph)
Windload
Structural
Destructive
Maximum Pressure
(+/-)
Glass burst at -8.4kPa
(175psf, 265 mph)
> -8.4kPa
(175psf, 265 mph)
>10kPa
(210psf, 290 mph)
>10kPa
(210psf, 290 mph)
>10kPa
(210psf, 290 mph)
Subjected to 2X cycling tests
+/-2.9kPa (60psf,
155 mph)
+/-2.9kPa (60psf,
155 mph)
For each cycle, temperature is maintained at -25
0
C for
15 minutes and +70
0
C for 15 minutes (+/-2
0
C)
For each cycle, temperature is maintained at -25
0
C for
15 minutes and +70
0
C for 15 minutes (+/-2
0
C)
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VHB™ Structural Glazing
Introduction
Note:
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Structural Joint Design
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Design Considerations – Adhesion
Design Considerations – Tape Width
and
Tape Width - Dynamic Loads
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Example:
1.0"
Note:
Example:
25 mm
Note:
Example:
25 mm
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Tape Width - Static Loads (Deadload)
Important:
and
Example:
0.75"
Note:
Example:
20 mm
Important:
10 mm
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Design Considerations - Differential Movement
Example:
105%
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Materials Involved in Glazing
Substrate Materials – Glass
Substrate Materials - Metal Frames
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Project Review and Warranty Obtainment
All VHB structural glazing projects must be reviewed on a
project-specific basis by a 3M technical service representative to begin the VHB
structural glazing process
Warranty Application/Project Review Process
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* Samples to be submitted:
Additional Testing Requirements
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Application Procedure for VHB Structural Glazing
Systems
Factory Glazing
Site Glazing
not recommended
Application Techniques
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The Work Environment
The Workbench
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Surface Preparation
Surface Preparation of Glass
Silane Treatment of Uncoated Glass:
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Note:
Important:
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Surface Preparation of Metal Frames
Abrasion: (if required per the 3M technical report)
Surface Cleaning:
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Priming: (if required per the 3M technical report)
VHB™ Structural Glazing Tape Application
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Tape Application to Glass and Pressure Application:
pg_0030
Joining of Parts and Final Pressure Application:
pg_0031
Weather Sealant Application
Important:
Bond Build Rate
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Sloped Glazing
Protective Glazing
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Replacement and Remedial Glazing
Replacement Glazing Due to Glass Breakage
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Replacement Glazing Due to System Failure
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Documentation – Quality Assurance and Warranty
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3M VHB™ Tape Structural Glazing Project Checklist
Project Initiation
Technical Assessment
Project Approval
Fabrication Training
Quality Assurance and Production Control
Project Completion
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VHB™ Tape Structural Glazing Application
Customer Warranty Request Form 1.1
Warranty Request Form to be completed by 3M Sales, Mktg. or Tech. Service and
Customer. Document returned to 3M to initiate Initial Assessment.
Project Materials
Project Specific Design Parameters
Note:
NOTE: Customer assumes responsibility for meeting local business codes
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Production Quality Control Sheet
Example, please contact your local Technical Service to modify to
customer needs
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