Do it Silicone Plumber Grease, 1/2 oz. is a high-quality silicone grease that is 90% pure and from petroleum additives, providing superior heat resistance up to 450 degrees Fahrenheit d to lithium-based greases. This nonstaining formula is for use on rubber and synthetic O-rings, ensuring smooth operation and long-lasting protection. The product comes in a convenient 1/2 fluid ounce cup, packaged in a blister card for easy handling and storage. Model Number: 050092