When valves become difficult to operate, seals are damaged during assembly, or water exposure transforms routine maintenance into persistent rework, the issue often lies not with the component itself but with the interface. MOLYKOTE^® 111 Compound is engineered to address sealing and lubrication challenges at these interfaces, particularly where water contact, temperature fluctuations, and prolonged use degrade ordinary greases and sealants. Its durable formulation provides assurance that equipment functions smoothly and efficiently without frequent disruptions.
This silicone compound features a heavy consistency, designed for enduring sealing and lubrication amidst pressure and temperature variations. It is crafted to prevent water intrusion, resist deterioration in both hot and cold water, and maintain integrity across diverse chemical environments.
Additionally, it is compatible with various elastomers and plastics, making it a practical choice for maintenance teams managing multiple valve types and seal materials. Its adaptability extends to numerous industrial applications, enhancing operational reliability.
Key selection proof points

• Operating temperature range: -40 °C to +204 °C
• NLGI Grade 3–4, silica thickened, translucent white
• Low volatility and low vapor pressure (reduces migration and loss)
• Meets potable-water grade standards and supports NSF 51/61 and FDA compliance

Some users may be familiar with MOLYKOTE^® 111 by its former names, Dow Corning 111 or Dow Corning MOLYKOTE 111, as Dow Corning was previously the manufacturer. While the branding has changed, the product continues to offer the same trusted performance. Potential offsets might include other silicone-based greases or sealants, but MOLYKOTE^® 111 remains a preferred choice due to its proven track record in demanding environments.
If you are deciding between an O-ring lubricant, a valve lubricant, and a sealant for a water-contact application, send us the valve type, seal material (if known), temperature range, and whether exposure is intermittent or continuous. We will confirm the best-fit MOLYKOTE^® grade and packaging for your maintenance process.