Slingsby Brown De-Icing Rock Salt Bag Size kg: 1000. Capacity kg: 900. Includes: A small quantity of anti-caking additive to maintain spreading properties after prolonged storage. Product Technical Data: Capacity kg: 900. GTIN: 5052105283104. Includes: A small quantity of anti-caking additive to maintain spreading properties after prolonged storage. . Product Type: Brown rock salt. Effective on ice and snow. Has consistent spreading properties even after prolonged storage with its anti-clogging additives. Meets BS 3247. Not as pure as white salt and therefore not as clean to use. GBP 299.99 1