Fireproof Substance

Fireproof Substances are relatively common drops, dropping from any bloon that can't be hurt by flames. In crafting, they're used to grant the ability to resist flames to items.

Dropped From
Oranges: 1%

Tigers, Fire-and-Ices, Purple-and-Oranges: 1.5%

Calicos, Dark Arts, Light Arts: 1.8%