Why MullionFlex™ 2
- Installs faster and easier than field-fabricated closures
- Moves with the building, independently lab-tested to ASTM E1399 Cyclic Movement Class IV, accommodating lateral movement from wind sway, thermal expansion and contraction, and seismic activity
- Reduces sound transfer between rooms, with independent lab-tested STC ratings
- Blends in, with finishes that match the window mullions or interior walls for a virtually seamless look
- Is covered by an enhanced warranty
- Complies with Build America/Buy America Act requirements