Partition Gap Closures
Mullion Mate® is an adjustable partition closure that creates the perfect transition between window mullions, windows, and partition walls.
Mullion Mate® is an adjustable partition closure that creates a seamless transition between window mullions (curtain walls), windows, and partition walls. Aesthetically pleasing, these spring-loaded partition closures bridge the gap to fit a variety of openings and provide excellent noise reduction up to 56 STC. Finished to match mullions, factory cut to length, and arriving to the jobsite pre-assembled, Mullion Mate’s ease of installation creates the solution to an everyday problem.
Design Attributes
- For vertical junctions between partition walls and window mullions
- Finished to match mullions
- Clear, medium, or dark bronze anodized, and Champagne
- Field paintable finish
- Powder coated in standard or custom colors (AAMA2604/AAMA2605)
- Custom Finishes available upon request
- Factory spring loaded to fit a variety opening
- Pre-assembled for ease of installation
- Factory cut to desired height, maximum 192″
- Optional Mullion Mate end cap to finish partition walls

Features & Benefits

Mullion Mate® 2,3,4 & 5 – Series 30 (Up to 37 STC)
Mullion Mate® 7 – Series 30 (Up to 37 STC)

Mullion Mate® 9 – Series 30 (Up to 37 STC)

Mullion Mate® 3,4 & 5 – Series 40 (Up to 56 STC)

Mullion Mate® 7 – Series 40 (Up to 56 STC)

Mullion Mate® 9 – Series 40 (Up to 56 STC)

Green By Design
- Products contribute to LEED® certification
- In-House Finishes
- Biodegradable pre-treatment powder coat (no phosphates)
- No hazardous waste
- No VOC’s
- No Heavy Metals
- Reference our sustainable brochure & sustainability page for more information.
Product Data
Mullion Mate® Series 30 Consolidated Set
Mullion Mate® Series 40 Plus Consolidated Set
Mullion Mate® Series 30 Specifications
Mullion Mate® Series 40 Plus Specifications
Gap Closures for Fire Rated Walls