My day started off with waking up to both sides of my kitchen sink being completely stopped up. I poured the Drano Max gel in both sides and waited for 20 minutes. I went and checked and it had went down a little. Per bottle instructions I then poured some more in both sink bowls. Waited over an hour this time and it went down. I enclosed photos so you can see how bad it was clogged up. This product is guaranteed to work or it's free. This Max gel works on hair clogs, standing water, slow drains, and pipe build up. It's safe on metal and plastic pipes. So if you wake up to clogged sinks like I did. Go out and get you a bottle of this and try it. It's a lot cheaper than calling a plumber.