CRL Gray 1/16" x 1/2" Butyl Glazing Tape Window/Glass Seal

• Age- and weather-resistant butyl rubber formula
• 100% solids content — VOC 0%
• Meets AAMA 804.3, 806.3 and 807.3 certification
• Used as an exterior primary spacing and glazing seal for window sash and architectural glazing
• Available in Gray and Black

CRL Butyl Architectural Glazing Tape (SKU: GT107) is an extruded, preformed tape on release-paper rolls. Formulated from weather‑resistant butyl rubber, it creates a long‑lasting, flexible exterior glazing seal that accommodates normal expansion/contraction and wind loading. Ideal as a primary spacing and glazing seal when installing glass into a window sash, it also seals metal‑to‑metal, wood‑to‑glass and metal‑to‑plastic joints. Tape thickness is designed for approximately 10% compression at installation to accommodate surface alignment.

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°F (25°C)
Temperature Range: Application 20°F (-7°C) to 120°F (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, 807.3; ASTM C1281

Good Glazing Practices

For best results with this butyl architectural glazing tape, adhere to these glazing best practices: surfaces should be free of frost and standing water, brushed and solvent‑washed (MEK, toluene or naphtha) then wiped dry. Provide positive contact and ~10% compression at installation so the tape fully marries surfaces. Keep tape under compression with clips or wedges for optimal weather seals. Use 80 Durometer Shore A setting blocks at sill quarter points; use 50 Durometer Shore A spacing shims when glass lite exceeds 100". Place sill tape at or above the sight line unless a cap bead is specified—if so, place tape 3/16" (4.8 mm) below the sight line. Do not overlap tape ends; butt ends without stretching. Leave 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 specify