flameproof
/ˈflæmpruːf/Definitions
1. adjective
resistant to or protected from fire
“The flameproof fabric was used to create a fire-resistant curtain.”
2. noun
a device or material that is resistant to or protected from fire
“The electrical panel contained a flameproof switchboard.”
3. verb
to make (something) resistant to or protected from fire
“The firefighters flameproofed the entire building after the fire.”