70% Joint Movement
Superior flexibility exceeds ASTM C-920 Class 35 requirements
Commercial Development
AU-1 Commercial Construction Sealant delivers 70% joint movement and exceeds ASTM C-920, ensuring long-term performance for window installs, expansion joints, and curtain wall systems in demanding commercial environments.
Performance Advantages
Why Developers Choose Tower
No Primer Needed
Molecular-level bonding to most substrates saves time and labor
Lifetime Performance
Lifetime Warranty
Expert Support
Technical assistance for specification and application
Product Solutions
Commercial Construction Products
AU-1
Advanced Acrylic Urethane construction sealant with 70% joint movement capability. The gold standard for commercial construction.
Key Specifications
- Exceeds ASTM C-920 Class 35
- 70% joint movement
- 17 stock colors
- Lifetime Warranty
- No primer on most substrates
- Fast lead times (≈5 days)
Applications
Expansion joints, Window Installation, curtain walls, panel joints, perimeter sealing
Shop NowAU-1 Hybrid
Hybrid polymer technology combines the best attributes of polyurethane and silicone for versatile performance.
Key Specifications
- Low Temperature and wet application
- Paint & water ready in 1 hour
- Low VOC
- Excellent UV resistance
- Superior adhesion
- Fast cure
AU-1 LAB
Built for more than openings, hybrid polymer technology delivers performance across walls and weather-resistive systems.
Key Specifications
- Meets Performance requirements of AAMA 714-22
- Tested in accordance with performance requirements of ABAA for weather-resistive barrier materials
- No primer required
- Spray, brush, or roll
- Permanent protection
- Fast, easy application
Applications
Window rough openings, door frames, transitions, penetrations, Broadwall Weather Barrier
Shop NowProject Applications
Trusted Across All Commercial Sectors
High-Rise Buildings
Curtain wall systems, expansion joints, and panel sealing for towers and skyscrapers.
Mixed-Use Developments
Complete sealing solutions for retail, residential, and office spaces.
Healthcare Facilities
Low-odor, low-VOC products meeting stringent healthcare requirements.
Educational Institutions
Durable, long-lasting solutions for schools, colleges, and universities.
Hospitality Projects
Fast-curing products that minimize downtime for hotels and resorts.
Industrial Buildings
Heavy-duty sealants for manufacturing plants, warehouses, and distribution centers.
Partner with Tower for Your Next Project
Get technical specifications, product samples, and expert support for your commercial development.