The ExpandaMull™ Partition Gap Filler is an excellent solution when noise control and fire ratings are not critical. Partition gap fillers have been used for decades to enable differential movement between the interior and exterior building systems, but their design was past due for an update. Gone are the unsafe, point loaded springs, replaced by upcycled, environmentally friendly expanding foam. Extruded aluminum surfaces can be pre-finished or field painted and are engineered to enable quick installation. ExpandaMull™ is the first partition gap filler to back up their sustainability statements with a 3rd party verified Declare Label.

Looking for an acoustic or fire rated trim? Check out Mull it Over.