What's the adjective for meltability? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs melt, molt, moult and melt down which may be used as adjectives within certain contexts.
“The fire's heat warmed the ice until there was frost and then melting frost, and then the melting frost transformed into a frost giant and into a cow.”
“Then he tried silicon carbide which held the carbon combined with the silica until glaze melt when the carbon was then able to reduce the oxides in the moulten glaze.”