Overarmour Floor Coating. Over armour is a lightly-textured, solid colour coating designed to bridge cracks, hide imperfections and give a uniform look to old, weathered wood. Kilz over armour can also be used over cracked and weathered concrete. Available in limited wood stain and concrete colours. ideal for properly prepared weathered or cracked horizontal wood and composite surfaces such as decks, porches and boat docks, as well as concrete surfaces like pool decks, patios and sidewalks.