One Chem - Heavy Duty Sink Unblocker - Drain Unblocker - Ready to Use Cleaning Products - 2 x 500ML - Kitchen Sink, Bathroom Sink and Shower Drain Unblocker One Chem Heavy Duty Outdoor Drain Unblocker is a specially formulated one shot liquid which clears grease, fat and food deposits in drains, gulleys and waste outlet pipes.
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