I've been pulling my Aprilaire filter holder out about every 1 - 2 months to see how the filter is doing.
Today, I noticed that some of the insulation (actually looked like excelsior) peered below the edge of the cutout. I always shine a light inside to check for dirt inside the housing and to check the blower.
While doing so, I noticed some dust particles floating in the light beam. I tapped the insulation to see if that was the source of the particles, and it was.
I would like to seal the edge of the insulation to prevent further 'flaking' of particles. Since this is in the blower compartment (Rheem Mod), can someone recommend a sealer?