As your structure ages, inevitable cracking in your foundation will occur. This is because as a structure settles over time, weight gets displaced to areas that originally didn’t have as much. Mar-flex has designed a system to eliminate these unsightly, and dangerous cracks. The Mar-flex Control Joint System creates vertical control-joints on both sides of the foundation wall, and to add further protection, an outside control-joint is created when filled with Mar-flex Waterstop Elastomeric Sealant and protected by Mar-flex Fiberglass Fabric Reinforcement. All residential basements require foundation walls that are watertight and waterproofed, that’s why Mar-flex designed this economical, easy to use system which eliminates those otherwise unavoidable random shrinkage cracks.