Sika Monotop 352NFG 20KG Bag of Mortar Sika Monotop 352NFG 20KG Bag of Mortar. R3 Light Weight High Build Concrete Repair Mortar with Corrosion InhibitorSika MonoTop®-352 NFG is a 1-component, polymer modified, fibre reinforced, low shrinkage light weight repair mortar with corrosion... $69.00 Compare