CRL GT207 Gray 1/8" x 1/2" Butyl Glazing Tape

CRL GT207 Gray 1/8" x 1/2" Butyl Glazing Tape

C.R. Laurence GT207 Gray 1/8" x 1/2" Butyl Architectural Glazing Tape offers a reliable solution for creating a durable weather seal in various architectural applications. Formulated from age and weather-resistant butyl rubber, this tape ensures long-lasting performance, making it ideal for glazing glass into window sashes and sealing architectural surfaces like metal joints and wood to glass connections. The tape’s 100% solids content guarantees no asbestos and contributes to its robust functionality. With a thickness designed for approximately 10% compression upon installation, the GT207 accommodates surface alignments while maintaining a secure bond. The product is compliant with AAMA standards, ensuring its suitability for exterior use. It operates effectively in a wide temperature range, from 20°F to 120°F for application and service temperatures as low as -40°F and up to 190°F. Available in both gray and black, the GT207 comes in 25-foot rolls and is easy to handle. Its service life exceeds 20 years, providing peace of mind for building professionals and homeowners alike. For optimal results, adhere to good glazing practices by ensuring surfaces are clean and properly prepared before application, ensuring a tight and effective seal that stands the test of time.

Gray 1/8" x 1/2" Butyl Architectural Glazing Tape

• Age and Weather Resistant Butyl Rubber Formula
• 100% Solids Content
• Meets AAMA Certification
• Used as an Exterior Primary Spacing and Glazing Seal
• Available in Gray and Black

CRL Butyl Architectural Glazing Tape is an extruded, preformed tape furnished on release paper rolls. Based on a butyl rubber formulation with proven age and weather resistant properties, it is designed to create a long lasting, flexible weather seal between two surfaces that will be subjected to normal expansion/contraction and wind loading forces. It is used as an exterior primary spacing and glazing seal when glazing glass into a window sash; also used to seal other architectural surfaces such as metal to metal joints, wood to glass, metal to plastic, etc. The thickness is designed to be compressed approximately 10 percent at installation to accommodate surface alignments.


Typical Properties
Base Polymer: Butyl rubber (polyisobutylene)
Solids Content: 100% solids (no asbestos)
Cure Time: Fully cured before application
Hardness: 20 Durometer Shore "A" @ 77° (25°C)
Temperature Range: Application 20°F (-7°C) to 120°(49°C), Service -40°F (-40°C) to 190°F (88°C)
VOC Content: 0%
Joint Movement: ±15% of joint width
Service Life: 20 year minimum

Applicable Standards: AAMA 804.3, 806.3, and 807.3. ASTM C1281

Good Glazing Practices
The following "Good Glazing Practices" are recommended when using CRL Glazing Tapes. Surfaces to be adhered should be free of frost or standing water, brushed clean, solvent washed (MEK, Toluene or Naptha) and wiped dry. At installation, positive contact and approximately 10 percent compression is recommended to fully marry surfaces to be joined. Glazing tapes kept under compression with clips or wedges provide the best seals.

Always use setting blocks (80 durometer Shore "A" hardness) placed at the sill quarter points. Spacing shims are recommended to accommodate wind loading when glass lite is over 100" (50 durometer Shore "A" hardness). Tape placement on the sill rabbet is not to be below the sight line unless a cap bead is specified, then tape is placed 3/16" (4.8 mm) below the sight line to allow for the cap bead. Do not overlap tape to join; always butt ends without stretching. To keep the tape surface clean, leave the release paper in place until ready-to-set the glass.


Product Warning:

Limitations: For applications above two floors use a spacer, shim, or a structural cap bead (such as silicone) to prevent over compression or use CRL 100+ Load Bearing Glazing Tape.

Resources

• Safety Data Sheets GT207.pdf
• Specifications AVD3788-GT.pdf