"Well, I can't attest to White Cloud's usefulness as wadding, but Estes wadding will also burn really well if you touch a match or lighter to it - as I learned when I did a demonstration at Rocket Camp.
"See? Wadding won't burn if you... Oh! Oh, gosh!" I said, stifling my desire to swear as I threw it on the floor and stomped it out.
That was last year. One of my returning kids kept bringing it up this year."
I also did a burn test recently of several different Kevlar sources. The Apogee shock chord burned a lot more easily - and more vigorously - than the Kevlar kite string I got from emmakites.com.
So, the match test may not be a good indicator. You might need to do a static test in a tube. I tried soaking cotton balls in water with baking soda, as I'd heard baking soda would make paper towels into wadding. The cotton balls turned out stiff and didn't stay fluffy like I'd hoped, so they weren't superior wadding, but they definitely did the job with no flames or even scorch marks like you sometimes get on the Estes wadding."
I touched a lit match on some Estes wadding this morning. I tried to light two different pieces from two different packages.
The first piece lit on fire, it was a slow burn and was put out in water.
The second piece from another package was blackened but didn't catch fire.
There might be some inconsistencies between wadding packages. Estes made their wadding in the US for many years. I believe production went to Mexico for a while and is now made in China.