Product disclaimers should disclaim warranties, and limit your liability. State that you disclaim all warranties unless explicitly stated or required by law. State that you will not be held liable for any damages as a result of using the product, unless required by law. These disclaimers tend to be heavy on legal language.
This article is not a substitute for professional legal advice. This article does not create an attorney-client relationship, nor is it a solicitation to offer legal advice.