Permacite Plating is a technology that can be researched at the Research Center in Tech Level 4. It costs 200 Carbon and 150 Ore, and gives buildings +10% Hit Points, +1 armor, and +1 pierce armor. Durasteel Reinforced Support Beams must be researched before it becomes available.
Like the previous upgrade, this technology is a cheap and useful improvement, but not vital.
"An improvement to DuraSteel Support Beams technology, Permacite Plating makes your buildings even denser and tougher."