Easy to mix and use, find the post mix you need at BC Profiles. We currently stock FP-ECOFIX fence post concrete mix, a rapid setting concrete that sets in just 5-10 minutes. This post mix can be used on a wide range of fence posts including wood, metal and concrete with no mixing required, simply add water. Our post mix bags are recyclable, showerproof and available to buy online. Find post mix and more building essentials including ACO concrete drainage channels when you choose BC Profiles today.