(4 pack) Liquid Lightning Virgin Sulfuric Acid Drain Opener, 64oz

Very effective product! This is highly concentrated sulfuric acid -- HANDLE WITH EXTREME CARE! Take the bottle precautions seriously: the fumes can burn your airways and lungs, and if you get the liquid on you it will eat right thru your skin in a hurry (this is all first-hand knowledge). When you go to Walmart to buy this, take a plastic tub with you and put the bottles into the tub instead of right in your vehicle. Of the 6 bottles I have purchased, 4 were leaking. Leaking acid will eat right thru your vehicle's interior or carpet. It will also eat right thru tables or flooring or anything else you might set it on, including concrete which it will permanently etch. Yes, all first-hand knowledge again. Always pour this drain opener (acid) into standing water, do not pour it into a drain and then add water on top -- if you do it will boil and spatter and potentially geyser up out of the drain like a volcano and spatter over nearby things including you if you're standing there (again, first-hand knowledge). This drain opener is 93% sulfuric acid; that is, it's almost pure acid and as strong as sulfuric acid can be made. It has red dye added so that it can bee seen more easily when poured into standing water (undyed sulfuric acid is naturally clear like water). This product will dissolve just about anything in your sink drain to unclog it. It is also effective at dissolving certain kinds of alkaline rock, such as caliche and limestone, which can come in handy when digging holes for trees.