Цементы огнеупорные, растворы строительные, бетоны и аналогичные составы: Смесь огнеупорная алюмосиликатная бетонная на высокоглиноземистом цементе сухая СМКРВЦ-45

This is a detailed code with no brand: it fits if your product matches the description in its name. If it doesn't, pick another code in this category. This category's general code can't go on an e-invoice, nor, for marked goods, on a receipt: it takes a detailed code. If there is none, request one on tasnif.soliq.uz, or through mkinfo.uz for building materials.