I believe you mean “non-flammable”. “Inflammable” means the same as “flammable”, the “in-” here being not a negative prefix but having causative meaning, as in “inflame”. “Flammable” was coined to avoid the confusion about what “inflammable” means.
I believe you mean “non-flammable”. “Inflammable” means the same as “flammable”, the “in-” here being not a negative prefix but having causative meaning, as in “inflame”. “Flammable” was coined to avoid the confusion about what “inflammable” means.