NCD and SILMACO work together By 1st October we are glad to offer the Sodium Silicates from SILMACO Belgium.The portfolio includes the following products: Sodium Silicate Pentahydrate (Fine and Medium Granules) Sodium Silicate Anhydrous (Powder and Granules) Sodium Silicates (Powder and Granules) Silmaco uses only the purest quartz sand in the world to produce silicates on a high quality level for its customers. They can customize their production of sodium silicate to provide the molar ratio (the ratio of disodium oxide to silicon dioxide) after customers require.