Gunther Extra Build Mirror Mastic

• Exceptional Build-Out: Allows build-out up to 2-1/2".
• Versatile Bonding: Adheres to a wide variety of substrates.
• Fast & Strong: Achieves 25% strength in 24 hours and 100% maximum strength within 30 days.
• Convenient Packaging: Available in easy-to-use cartridges and economical gallon pails.