Kelkay Build Mate Fix-A-Post is a rapid-setting concrete mix designed for quick post installations and repairs. This ready-to-mix blend of kiln-dried sand, cement, and additives sets in just 16 minutes—ideal for securing wooden, concrete, or metal fence posts, washing line posts, and garden edging. Simply add water to activate the mix. Each 20kg bag is convenient to handle, with 2 bags typically required per post. The high-quality formulation ensures durable, long-lasting results in all outdoor conditions. Store in a dry place to maintain mix integrity. Perfect for both professional and DIY garden projects where speed and reliability matter.