CRL Gray 1/16" x 3/8" Butyl Window Glazing Sealant Tape

• Age- and weather-resistant butyl rubber formula
• 100% solids (no solvents)
• Meets AAMA 804.3, 806.3 and 807.3 certification
• Used as an exterior primary spacing and glazing seal for windows and curtainwall
• Available in gray and black

Extruded, preformed butyl tape supplied on release-paper rolls. The polyisobutylene-based compound provides a long-lasting, flexible weather seal that accommodates normal thermal expansion/contraction and wind loads. Ideal as an exterior primary glazing seal when setting glass into a sash and for sealing architectural joints (metal-to-metal, metal-to-glass, wood-to-glass, metal-to-plastic). Designed for approximately 10% compression at installation to ensure full contact across mating surfaces.

• Base Polymer: butyl rubber (polyisobutylene)
• Solids Content: 100% (no asbestos)
• Cure: 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 Capability: ±15% of joint width
• Service Life: 20 years minimum

Surfaces must be free of frost and standing water, brushed clean, solvent-washed (MEK, toluene or naphtha) and wiped dry. Apply tape with positive contact and approximately 10% compression to fully marry surfaces. Maintain compression with clips or wedges for best sealing performance. Use 80 durometer Shore A setting blocks at sill quarter points. Use spacing shims for lites over 100" (50 durometer Shore A). Place sill rabbet tape at or above the sight line unless a cap bead is specified—then place tape 3/16" (4.8 mm) below the sight line to allow for the cap bead. Do not overlap tape ends; butt ends without stretching. Keep release paper in place until ready to set the glass to keep the tape surface clean.