Westbuild Kwikset Concrete is a premium blend of sand, aggregates, general purpose cement and fast setting accelerants to provide quick stabilising support. This fast setting concrete sets in 5-15 minutes and is ideal for posts, clothes hoists, letterboxes, garden lighting, pergolas and any non-structural posts. It is not suitable for structural use. Now available in new rainproof packaging, keeping it fresher for longer, it can be stored outdoors and is cleaner to transport and handle.