Sign-Express guarantees all of its custom letter sign products for life. This means that should a letter fade, break, or contain any defect, we will refinish or replace the defective letter at no cost to you, as long as the letters are installed on their original location. All materials used in the construction of our custom letter signs are UV and chemical resistant. We use an anodized aluminum for our metal letters that protects against corrosion. All of our letters and logos are designed to last a lifetime.