So, I went snooping for high density foam......jeez, you'd think I was looking for a unicorn.
I was in Lowe's when it struck me that my tool box liners are HDF. I looked in the toolbox section, no luck. I also remembered that i've used that stuff for drawer liners at home. So off I went to the shelving section and sure enough, they had this.
It's half the thickness of what I need, but God invented glue for a reason.
Then the search began for thicker HDF. Why? Do you know that gasket that sits between the heaterbox and the firewall? The one the heater core and a/c condenser go through into the engine bay.
No joy at all here. When I was in Lowe's i went by the door matte area, that made me think of my mixing room at work, we have some HDF connecting mattes in there to make our feet feel ever so comfortable while mixing paint. I could cut those pieces into a new gasket, if I wanted a yellow and red gasket. What I did instead was to look for them at Lowe's. They had them for $20 for a pack of four squares that are 2'x2'. It came to me that Harbor Freight had these too. Who would be cheaper, Lowe's or Harbor Freight?
Harbor Freight had the same ones with a different label for $7.50. FTW. They are the same density as the original gasket material.
So I cut out three layers of them to replace the gasket.
The gasket is two parts glued together. The larger piece is thinner and happened to have the exact same thickness as the matte, easy peasy. The smaller piece is thicker by about 1/2. So I took two of the layers and glued them together. Then I rough shaped them and took some 40grit sandpaper and started to thin the two layer sandwich down to match the thicker gasket piece.
I used a round wood rasp to shape the holes for the a/c evaporator and heater core to fit through. They're not quite finished, but real close.