It powers through to the source of the blockage to resolve the issue and give you free running water again. Use regularly to ensure pipes and drains remain problem free. Gets to work in just 5 minutes. Safe for use on all pipes. Dissolves grease, hair and soap. For indoor and outdoor use. Protect your sinks and drains by using this drain unblocker on a regular basis. Simply add 1 Litre of product to the affected sink or drain and allow the product to work for at least 5 minutes. For best results, leave for up to 1 hour and then flush through with hot water. If problem persists, treat again, and leave solution overnight.