Best Con Leak Plug is a high-performance, quick-setting waterproof plugging compound specially designed to stop active water leakage through cracks, joints, and holes in concrete and masonry surfaces. It provides instant sealing even under water pressure and develops strong adhesion with the substrate. The product is ideal for emergency repairs in basements, water tanks, tunnels, retaining walls, lift pits, and other water-retaining structures. Its easy application and rapid hardening make it an effective solution for permanent leak stopping and waterproof maintenance work. It usually take only 20 second to set, time may vary according to ambient conditions.