Taint resistant blocks

"Taint has the nasty effect of covering everything in it's reach with slimy vine-like tendrils. No matter what you do they get everywhere and they make living with it near impossible. You've tried to fight it back, but taint is relentless. After some work, you realized that that the answer has been right under your nose! By infusing simple materials with a touch of taint, it tricks the tendrils into thinking it's already covered. Using these blocks, a paradise in a corrupted land is now a possibility..."