Highly effective gel drain unblocker for clearing domestic and commercial drains. The gel formula adheres to the inside of pipes, penetrating blockages and dissolving organic residues, grease and build-up responsible for blockages, whilst also helping to reduce unpleasant odours. Suitable for use on PVC, plastics, metals and rubber (do not use on chrome or aluminium surfaces). If possible, remove any standing water before application. Pour at least half the bottle directly into the blocked drain, leave to work for about 15 minutes and rinse with plenty of very hot water. Repeat if necessary. Keep the bottle tightly closed. Do not allow the product to dry on surfaces.