Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work

I used to install and repair waterbeds for a living. Recently my own waterbed sprung its first leak so I bought this product. It's terrible. I have patched my bed three times now, and I awoke this morning to it leaking once again. I'm throwing away the remaining product and am going to find what I used to use (Blue Magic if my memory serves me).