Barrettine 500g Caustic Soda Barrettine 500g Caustic Soda Granules for dissolving in cold water to clear blocked drains and clean surfaces. Can also be used to strip paint when neutralising with white vinegar. Where kitchen waste disposal units are fitted or connected to a septic tank, use Knockout® Biological Drain Treatment. PLEASE NOTE DUE TO SHIPPING RESTRICTIONS THERE IS A MAXIMUM ORDER QTY OF 2 FOR THIS PRODUCT
