Seals cracks and seams under water. You can successfully plug leaking cracks when your pool is full. This sealer will dry in about 30 minutes under water. Select Sealer Above: 1533W - Rusco permanent sealer, 10 oz. cartridge, white 1533W-HV - Rusco permanent sealer, high viscosity, 10 oz. cartridge, white 1533C-HV - Rusco permanent sealer, high viscosity, 10 oz. cartridge, clear