Cement-based, quick-set, waterproof cement for setting bolts, hooks, fence posts, mailbox posts, hand railings, wood, metal, plastic or fixtures into concrete. Use on concrete, brick, and stone. Instantly seals wall-floor joints, mortar cracks, holes, chimneys and pipe. Non-shrinking, high strength, and waterproof. Sets in 30 minutes. Interior/exterior. Just add water.