Gunther Extra Build Mastic – Cartridge (Black)

Gunther Extra Build Mastic is a heavy-duty mirror adhesive designed for projects requiring significant build-out and strong, reliable bonding. Formulated to build out up to 2-1/2 inches, it adheres securely to a wide range of substrates, making it ideal for demanding installations. The mastic develops 25% strength within 24 hours and reaches 100% cure in 30 days, ensuring long-lasting performance. Offered in convenient cartridges and economical gallon pails, it meets the needs of both small and large-scale jobs. For optimal stability, GLAZE recommends using mechanical fasteners alongside mastic.

• Gunther Extra Build Mirror Mastic Allows Build Out Up To 2-1/2"

• Bonds To Various Substrates 

• 25% Strength In 24 Hrs. / 100% Max Strength In 30 Days

• Available In Both Convenient Cartridges and Economical gallon Pails 

• Glaze Recommends Using Mechanical Fasteners in Conjunction with any Mastic Installation

• Case Quantity: 24 Tubes