Once the surface is clean and dry, apply the sealant
sealing a galvanized water tank. Ensure the sealant you've chosen is specifically designed for galvanized metal and water contact. Using a paintbrush, spread the sealant evenly along the seams, joints, and any potential leak points. Be generous with the application, as a thin layer might not provide adequate coverage. Allow the sealant to cure according to the manufacturer's instructions, which could range from a few hours to a full day, depending on the product.