retardant
Definitions
A substance used to slow down or prevent a chemical reaction, such as combustion.
A chemical agent applied to materials to reduce their flammability or delay the spread of fire.
Examples
The firefighters sprayed a chemical flame retardant over the dry brush to prevent the wildfire from spreading.
Many modern building codes require the use of fire retardant materials in the construction of high-rise apartments.
Synonyms
inhibitor preventative suppressant deterrent fireproofing agent