Glycol vapors are generally going to be cheaper, but they’re less far along. There isn’t a product you can buy that will maintain your space at the right concentration. The closest you can get would be Bleu Garde (formerly Grignard Pure) but they’re not actually selling their product.
I’d also be interested in a comparison with chemicals like propylene glycol with respect to biohardening public spaces.
Glycol vapors are generally going to be cheaper, but they’re less far along. There isn’t a product you can buy that will maintain your space at the right concentration. The closest you can get would be Bleu Garde (formerly Grignard Pure) but they’re not actually selling their product.