fireproof

This term conveys a sense of absolute security and permanence against thermal destruction. While similar to fire-resistant, which suggests a material can withstand heat for a period, fireproof implies a total immunity or a high-grade industrial standard of protection that prevents ignition entirely.

When used as a verb, the word describes a proactive chemical or physical intervention. It is most common in technical, architectural, or safety-compliance contexts, such as treating fabrics or building structures to ensure they meet strict legal fire codes.