If you're looking to repair a hole in sand and cement screed, ARDEX A 38 MIX is easy to use, and dries pretty fast too. Just mix with water to the desired consistency and apply with ARDEX A 18 bonding slurry to ensure a rock-solid repair. 4 hours later, it's ready for ceramic or natural stone tiles, and from 48 hours you can install resilient floorcoverings such as carpet, vinyl, rubber or wood.