耐火 たいか被覆 ひふく ざいではありませんでした
taikahifukuzaidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 耐火被覆材

1. Was not fire-resistant coating.; Was not a fireproof covering.

Past/Perfective
Negative
Polite
Formal Register