CRL Gunther Ultra/Bond® Mastic Cartridge - Glass & Mirror Adhesive

• Gunther Ultra/Bond® compresses for tight tolerances such as overlays and mirrored furniture
• Compresses to 1/32" (0.8 mm) for mirror overlays; builds up to 3/4" (19 mm) for uneven surfaces
• Available in 10.1 fl. oz. cartridges or gallon cans

CRL Gunther Ultra/Bond® and Extra/Build® Mirror Mastics are high-quality mirror adhesives formulated to provide a strong, permanent bond between electro-copper-plated glass mirrors and common substrates. Field tested for compatibility with silver, copper, and mirror backing, these mirror mastics maintain a workable consistency year‑round and adhere to Drywall, Wood, Metal, Glass, Marble, and Tile (test for bleeding on porous or painted surfaces).

SKU: GN100A

Key benefits & differentiators:

• Designed for precision mirror installations — ideal mirror adhesive for overlays, medicine cabinets, and mirrored furniture
• High build and high compression: up to 3/4" build; compresses to 1/32" for tight tolerances
• Fast partial set: 30% of strength in 24 hours; full cure to 100% in 28 days at normal room temperature
• High final strength: tested to 400 psi when fully cured

Application notes: Not for use on acrylic mirrors. Use Cat. No. GN8 Gunther Prime‑N‑Seal Primer on all porous substrates. Mechanical support systems are recommended for all mirror installations. Follow CRL Gunther application guidelines and data sheets for spacing and vertical bead reinforcement (typical spacing 5"–6", bead 3" from mirror edge).

Warnings & safety: For indoor use only. Do not apply to wallpaper, vinyl safety films, acrylic mirrors, or untreated wood surfaces without testing. Use on clean, dry, grease‑free surfaces. Keep away from heat, sparks and open flame; vapors are flammable and may cause dizziness, headaches, or nausea. Avoid skin and eye contact and inhalation; prolonged or repeated exposure may cause serious health effects. Improper use, intentional abuse, or inhalation of product ingredients can cause serious injury.

Liability: Gunther Mirror Mastics and Royal Adhesives & Sealants LLC limit liability to the purchase price of the product. CRL assumes no express or implied liability for suitability of adhesives for specific mirror backs or applications. Users must verify compatibility and follow all installation guidelines.