I used 1/4 without adhesive for the underlayment for re-carpeting my C-150. It is working fine. The thickness is perhaps a little more than the quarter-inch I expected.

R. J Verified Purchase

SUPER SOUNDPROOFING 1/4" BLACK

I ordered a large amount of this material. Aircraft Spruce did a great job packaging the material and the shipment time was incredibly fast for a bulk item. The material was easy to work with and install.

This material seems terrific for insulation my Vans RV-7A experimental airplane. Im installing it now on the floor of cargo area and under seats. I cut it just slightly over size and smash it in. Im not glueing. Fills the gaps nicely. Seems like it will offer both Sound and temperature benefits. Doesnt weigh much. Im using 1 inch which stays under places where I mounted wires.

I had to service/replace some of the ceiling panels in my 1975 Commander so decided to soundproof while I was there. The early Commanders just had 1 fiberglass batts installed throughout most of the plane and these are acoustically useless. I removed them and cleaned the underlying surface with lacquer thinner to give a good surface for new adhesive. I selected the 1/2 thickness for the ceiling/sides based upon the weight and also because most of the stringers in the Commander are 1 or larger so this left easy access for running the existing antenna and power cabling on top of the insulation. This was easy to cut with scissors. I used the old removed pieces of fiberglass as rough templates. For the aircraft sides and ceiling I slightly oversized so that the pieces would hold into place during a test fit then applied 3M 90 contact adhesive to all corners then every about every 6 inches. For the rear plastic bulkhead parts, I removed the old fiberglass, cleaned the surface and repaired old holes/cracks, then applied this soundproofing to the rear of the pieces with plenty of contact cement. Sounds reduction is pretty good but hard to compare to anything else. Coming from the original fiberglass which acoustically did nothing to this is obviously a substantial improvement. I havent yet done the firewall and front foot well areas as they will want 1 or more, but Im pleased with the ease of working with this product and weight.

glues in with weatherstrip adhesive or contact cement or cut it oversize and stuff it into a cavity. reduces sound in the 1/2 thickness pretty well.

Looks good. Haven’t installed it yet as I have other work to finish first. Seems very stout compared to he 60 year old deteriorated product that just vacuumed up.