Tier1 Food Grade Silicone O-Ring Lubricant (0.2 Ounce Package) OR-LUBRICANT-SM Meets FDA: 21 CFR 175.300 Certified to NSF Standards 51 and 61 Silicone lubricant is safe and easy to use Other types of lubricant are not recommended for use with o-rings Helps to prevent leaks on filter housings by creating a proper seal and preserving the integrity of your o-ring