Ans: A multi-step process is essential to permanently waterproof concrete. First, the surface must be cleaned thoroughly to remove debris and contaminants. Next, cracks and weak points are repaired using epoxy injections or sealants. Once the surface is prepared, a high-quality waterproofing material, such as crystalline admixtures, is applied. These admixtures penetrate the concrete and form crystals that block water paths, providing long-lasting protection. For existing slabs, polyurethane or elastomeric coatings are effective solutions. Before waterproofing, it's crucial to address underlying issues. EZ Plumbing USA offers reliable Slab Leak Repair in Mission Viejo, ensuring the slab is free of leaks or damage before the waterproofing process.