DETAILS SHOWN IN THIS WEB CONTENT WERE DEVELOPED TO SHOW GENERIC RESTORATION GLAZING APPLICATIONS. THE DETAILS ARE NOT INTENDED TO REFLECT THE ACTUAL DESIGN OF THE WINDOW OR WALL SYSTEM. THIS WAS DONE SO NOT TO DIVULGE ANY PROPRIETARY DESIGN CONFIGURATIONS BY ANY WALL OR WINDOW MANUFACTURER

Restorations of glazing systems are undertaken for varied reasons such as remedy of water intrusion, improvement of energy efficiency, correction of improper installation, restoring performance lost due to aging components, renewal of aesthetic or historic renovation.

Tremco produces a broad line of glazing products including extruded- and molded-rubber gaskets, glazing tapes, silicone sealants and other components. Our skilled and experienced staff routinely assists with designing solutions for glazing restorations, from the seemingly simple to the decidedly complex. Simple replacement of an aged gasket benefits from our evaluation given to selecting one that provides improved edge-pressures for restoring performance while avoiding glass breakage during installation. More complex, our products and talent have combined to restore weatherproofing performance with a desired aesthetic appeal in designed solutions using glazing tape, silicone sealant and extruded silicone rubber to replace putty in the historic renovation of intricate steel windows.

The following section of Tremco's website has been created to help identify types of anomalies in the many different glazing systems. This information presented will review building issues that can cause leaks, types of glazing systems and recommended options for repair. You will also find a section on gasket compounds and comparison of these compounds to ASTM specifications.

By clicking on the links below, you will be taken to the glazing system of your interest to help you in determining the best option for repair as well as alternative customizable options that can be developed by Tremco's Design Engineering Group. Contact your nearby Tremco Sales Representative for assistance with taking field measurements and interfacing with our broader support staff.

Glazing Issues:
View typical aging issues, failures due to unanticipated movement, and other anomalies.

Investigation and Support:
Section providing information relative to replacing the existing gasket with new or with a headless wedge for cap bead application

Metal-to-Metal Seals:
These butt, lapped and/or mitered metal joint seals are critical to ensure the integrity of the system. Location and access will dictate the type of repair required.

Wet/Wet Glazing System:
This type of glazing system uses gunnable sealant and/or mastic tape as the primary seal at both the interior and exterior sightlines. These systems are designed to keep all air and water out of the glazing pocket

Wet/Dry Glazing System:
This type of glazing system uses gunnable sealants and/or mastic tapes as the primary seal on one surface and an extruded gasket on the opposite surface. These systems are under compression but their performance is not based upon the compression developed by the components, but by the seal provided by the sealant and/or tape.

Dry Glazing Systems:
This type of glazing system uses preformed rubber gaskets on both sides of the glass or panel as the seal, which rely on the gasket's compression to provide the necessary seal. These systems are designed to limit air and water infiltration. There are two types of dry glazing systems: Sponge/Dense and Dense/Dense. This design diversity allows the window or wall manufacturer the option to choose the glazing system, which will work best for their system.

Putty Glazed (Steel) Window Systems:
These systems utilize a dough like cement consisting of whiting and linseed oil to form seal between the steel frame and glass surface.

Operating Vent Weather Seals:
These systems utilize various rubber and/or PVC extrusions to create a compression seal. An operating vent may have multiple seals. These gasket profiles maybe in continuous lengths around the window frame's perimeter or supplied in picture frames utilizing molded corners.

Structural Lock-Strip Systems:
These systems rely on a rubber extrusion to retain the glass onto a building's façade, while providing the required air and water seal.

Silicone Molded Splice Connections and Components:
These extruded and molded silicone rubber configurations are known as silicone splice, silicone boots, and/or molded cruciforms. They are used to seal all types of metal joinery or gasket conditions. These products provide a greater bonding surface for the silicone sealant and may provide a more desirable aesthetic than can be accomplished with a tooled sealant.

• Molded Silicone Cruciforms ("X's," "T's" and "L's")
• Molded Silicone Sleeves (for vertical stack joints)
• Silicone Weep Hoods (molded or extruded)

Structural Silicone Glazed Systems (SSG):
These systems structurally bond the glass and/or metal panel to the curtain wall's structural framing members using a high-strength, high-performance silicone sealant such as Proglaze SSG, Proglaze II or Spectrem 2, specifically designed and tested for Structural Glazing applications. Dynamic wind loads are transferred from the glass through the structural silicone sealant to the curtain wall framing.

Sloped Glazing:
Glazing conditions 15 degrees or more off vertical are considered sloped applications and must be treated differently than typical vertical glazing applications. Consideration must be given to the weight of the glass or panel on the interior gasket and its ability to properly support this weight.

Gasket Compound Options, Compound Selection and Comparison to ASTM Specifications:
Section providing information on available rubber compounds used for compression glazing applications, bridge joints, weather seals, and covering existing components.