I've used it for years without problems--and I still have 80% of my 1st bale
Buy a bale, save some for yourself (large ziploc bags), give some to your
buddies, then donate the rest to your club. Dog barf is perhaps the best
investment <$10 that one can make in rocketry.
Cellulose ceiling insulation is okay for its thermal properties, but it
won't stop determined particulate matter very well. Use plenty of the stuff
if you don't also include some normal TP wadding at the top of the pile.
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