At Thrasher, we use NexusPro, a silicone-based crack and joint sealer developed by a company called Supportworks, for concrete crack repair and control joint sealing. NexusPro offers a long-lasting and durable solution that will keep moisture from seeping beneath your concrete garage floor, where it can cause further problems. When we install NexusPro, we prepare and clean the garage floor cracks, insert the product and then finish it off with native sand to give the whole surface a clean, finished look.