Sink and Drain gel is the powerful solution to clear slow running sinks, plugholes and pipes in your bathroom and kitchen. It's a combination of two powerful liquids that activate on contact to unleash a powerful cleaning gel that will remove gunge and hair from the entire width of the pipe, leaving your waste pipe clean and fresh. It will not damage septic tanks or pipes of any type. As with all cleaning products, it is important to read the instructions carefully before use.