Seals and hardens old and new concrete floors and walls. If you're rebuilding an old pond that's not in the best condition, or you're worried about your new render being a bit dusty - this is the product for you!
Simply sprinkle on with a watering can, then brush / sweep into the concrete. 1 litre covers 4 - 5 square metres (approx 15 sq foot). TWO coats required.