The phrase "material defects" refers to significant flaws or issues in a product or object that affect its overall function, value, or quality. These defects are significant enough to make the product imperfect or faulty. Full definition
Like licensees in agency relationships, transaction licensees must disclose known material defects about the property. (pacode.com)
A dual agent may not take any action that is adverse or detrimental to either party but must disclose known material defects about the property. (pacode.com)
It protects against manufacturing and material defects for life. (geekwrapped.com)