WD-40 Multi-Use Product (MUP) ® is the product you know and trust, with more than 70 years of proven performance. MUP is the most recognized and relied upon name in its class — protecting equipment from rust and corrosion, penetrating stuck parts, displacing moisture and lubricating almost anything. It’s now available in a variety of sizes and with other innovations, making jobs easier, safer and more efficient. WD-40 Specialist® products are designed for trade professionals and give professional performance to get specific jobs done right.