Waxed Oxidized Copper Trapdoor forms when Honeycomb waxes an Oxidized Copper Trapdoor, permanently sealing the copper against any further weathering. An Oxidized Copper Trapdoor starts as a plain Copper Trapdoor crafted from four Copper Ingots on the crafting grid, then reaches this teal, spotted final stage over time, because copper ages naturally like every other copper block in Minecraft. Waxed and unwaxed oxidized copper trapdoors also generate naturally inside certain dungeon-style structures, so players can find a ready-made Waxed Oxidized Copper Trapdoor instead of waiting for the color to change. Mining a Waxed Oxidized Copper Trapdoor needs a stone pickaxe or better; breaking one with a weaker tool or bare hands drops nothing.

A Waxed Oxidized Copper Trapdoor opens and closes through the Use Item control or a redstone signal: an active signal opens the trapdoor immediately, and a signal drop closes the trapdoor immediately. Thrown Wind Charges toggle a Waxed Oxidized Copper Trapdoor too, opening a closed trapdoor or closing an open one on impact, which suits wind-charge-triggered hatches. Because the copper is already waxed, a Waxed Oxidized Copper Trapdoor keeps the dark teal, spotted look forever: lightning bolts and axes that strip unwaxed copper back to a shiny orange have no effect on waxed copper. Builders who want a permanently aged trapdoor for ruins, mineshafts, or ancient-looking hatches can place a Waxed Oxidized Copper Trapdoor without any later touch-ups.