Is Kevlar Honeycomb allowed?

[Capt. Quirk]

These are my normal suppliers for Vacuum bag materials, Composites and Resin & Mold making products. They do not sell in small quantities like Aircraft spruce though.

Richmond Aircraft Products

The West coast supplier for Nomex honeycomb and Roahcell high density foams is Technology Marketing, Inc

For resins and rapid prototype mold materials I use PTM&W There are a few new resins on the market (like MGS), but in my tests none of them showed a strength advantage. The PTM&W products were easier for beginners to work with and were generally better in cold working conditions.

PTM&W also sells a wonderful product called RT2C, to make a very strong mold, very fast at room temp. It is a light weight, 2 part epoxy sand like material. We have also used it like somebody would use Nomex or Roahcell, it has excellent
compression capabilities. Here is it's PDF Data sheet

Hope this helps someone