Jetcem Deep Rapid Repair Sand & Cement is a premixed sand/cement based product which is easy to use and sets in approximately 30 minutes. Ideal for rapid patching or when a fast repair job is needed. Sets in the cold and wet. Strong and easy to use rapid setting repair compound. Internal and external repairs to gaps and cracks on walls, floors, steps and kerbstones. Repairs deep holes in concrete, stone and bricks.