Instant Power Crystal Lye Drain Opener, Lye Sodium Hydroxide, Unclogs Bathroom and Kitchen Sinks, Drains, Shower Pipes 1 Lb

this stuff is incredibly effective (way more so than the liquid drain openers). i use it on the bathroom sink/tub and kitchen drains (not in the disposal tho), and it seems to increase the flow markedly. also, the overflow in one of my bathroom sinks was totally blocked for years; i tried everything to get it clear to no avail until this product: i folded a sturdy notecard to create a little funnel and used it to spoon some crystals down the overflow, poured a little boiling water, and in 10 minutes the blockage was totally clear. i’m never going back. **note** you must use boiling water to activate it, so if using in a porcelain sink be sure to warm up the basin with hot tap water so as not to crack the porcelain with a sharp change in temp. also, the lye forcefully bubbles up for the first few seconds after the hot water hits it, so stand back, wear gloves, and keep your face away from the drain.

Took two treatments but worked like a charm. Prior to trying this I had tried different Liquid Plumr products, boiling water, etc and nothing touched my slow draining clog. This product opened up the clog and it has stayed unclogged for several weeks now. Highly recommend.

Love this product, have bought it for multiple time. Very effective, and remove the clog easily. Try not to breathe the steam in when pull the hot water.

I am always doubtful about “fix-all” product but this one is terrific! It undtopped a slower clog which was acting impossible - and in spite of the actual shower drain. We followed the instructions and it worked!!! Just terrific to be draining perfectly now!!!

it worked. but it took 3 times to cleat the drain.

Works great.

Terrible product. I used as directed but did not do anything but make worse. I wondered why it didn't drain. Plumber came and found that it had solidified in the pipe like being filled in with hard plastic. Plumber asked what that even was and that he had never saw anything like that in 25 years. Too much hassle to send back so I'm writing this review to save u the headache.

This stuff is amazing. I have tried so many drain cleaners and this one is by far my favorite.