こう粘結 ねんけつ ざいではありませんでした
kōnen ketsu za idewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 抗粘結剤

1. Was not an anti-icing agent.; Was not a bonding inhibitor.

Past/Perfective
Negative
Polite
Formal Register
Chemistry