Hello A few months ago I purchased a brand new replacement Magnum MF3541 230 CFM convection Blower. I was very impressed with the thick rubber gasket glued to the mounting flange to prevent vibration and noise. Since then, I looked alot for something similar and inexpensive. The room fan gasket does not need to be extremely high temperature like the exhaust fan does and rubber is a better choice to reduce noise and absorb vibration! I may have found it at Lowes. I found what is called a "Rubber Packing Sheet" in their plumbing department to make your own gasket! Click on pic below! They have sheets 6x6x1/16 and 6x6x1/8. I purchased the 1/8 inch thick because it seems as thick as the Magnum. Lowe's Part number is PP25547 also has # 31448 above bar code. http://www.lowes.com/pd_31448-143-PP25547_0__?productId=1082957&Ntt=rubber packing sheet&pl=1¤tURL=&facetInfo= According to this web site it has a hardness of Durometer = 75 http://www.sealsales.com/gasketmaterial/Redrubber75.shtml Amazon.com also sells this in 12x12x1/8 sheets for $11.78 per sheet Since my gasket was 4x4-3/8" I could get exactly 6 gaskets from it. That would be $1.96 per gasket. So Lowe's is cheaper this time! http://www.amazon.com/Rubber-Sheet-Thick-Width-Length/dp/B000MAJ10I/ref=pd_cp_hi_1 It does not state the thermal max but it is red and I know red rubber is good to approx 195 Deg F Has anyone tried this material? How does it work? So for $1.38 it is worth a try! As you can see in the second picture, the old Magnum MF3541 Convection Blower Gasket is a Rope Gasket. See Blue Arrows below. However the new Magnum MF3541 Convection Blower Gasket is Rubber. See Yellow Arrows below. This is the new trend to absorb vibration and reduce noise. The rubber gasket on the MF3541 is not a sticky silicon rubber gasket.