MULTI PURPOSE | EASY TO USE | AFFORDABLE The Nolka Dried Premix is an innovative new product that seeks to eliminate unnecessary time, effort and money spent into building concrete infrastructures. It comes in 50kg sacks containing 40 kg of 10mm high quality aggregates and 10kg of Portland Cement sealed in a separate poly bag. All you do is add water to the sacks contents, mix it and you are ready to lay your concrete.