Molykote Greases

Pick the grease by temperature, load and what it touches

NLGI grade, cone penetration and dropping point

Delivery

Molykote Greases across the Gulf

Questions we get asked

About this range

01What is the difference between Molykote 33 Light and 33 Medium, or 44 Light and 44 Medium?

Light and Medium are the same silicone grease made to two consistencies: Light is softer, Medium stiffer. The softer version feeds more easily, suits lightly loaded and low-temperature mechanisms and small instrument bearings, and is easier to apply through grease lines; the stiffer version stays in place better in larger bearings and on vertical or open surfaces. Base oil and chemistry are the same, so choose by how the grease is applied and retained. Check the NLGI grade and temperature range on the data sheet of each.

02Which Molykote grease should I use on plastic gears and plastic-on-metal parts?

Use a grease made for plastics, such as Molykote EM-30L, EM-50L, EM-D110 or PG-65 Plastislip, rather than a general mineral-oil grease. Some base oils and additives can soften, swell or stress-crack plastics such as polycarbonate and ABS, and the plastic grades are formulated to avoid that while damping noise and reducing wear in small gearboxes, slides and switches. Compatibility still depends on the exact polymer and the stress in the part, so test on the actual component before committing a production line.

03Which Molykote grease is for heavily loaded, slow-moving or shock-loaded bearings?

An extreme-pressure grease with molybdenum disulphide, such as Molykote BR-2 Plus or Longterm 2 Plus. Both are lithium-soap greases with MoS₂, made for metal-on-metal rolling and plain bearings that run slowly to moderately fast under high load, vibration or shock, where an ordinary grease film would be squeezed out. They are not the choice for very high speed or extreme temperatures; for those, look at a synthetic or PFPE grade and check its speed factor on the data sheet.

04Which grease for a valve exposed to fuel, solvents or aggressive chemicals?

Molykote 3452 Chemical Resistant Valve Grease. It is a fluorosilicone oil thickened with PTFE, made to stay in place on valve plugs, seats, stems and seals where fuels, solvents and many chemicals would wash out or dissolve a mineral or plain silicone grease. For the most aggressive media and highest temperatures, a PFPE grease such as HP-300 or HP-500 goes further. Send the medium, its concentration and the temperature so the grade can be confirmed against the data sheet.

05Can I mix two greases, or switch a bearing to a different Molykote grease?

Do not mix them without confirming they are compatible. Greases with different thickeners, lithium, calcium, polyurea, PTFE or clay, or with different base oils such as mineral, silicone and PFPE, can soften, harden or bleed oil when mixed, and the bearing may then run dry. When changing grease, clean out the old grease where you can, or purge it with the new grease until only the new product emerges, and shorten the relubrication interval for the first few cycles. The data sheets give thickener and base oil for each grade.

06What is dielectric grease or vacuum grease used for, and is silicone grease safe near paint lines?

Dielectric grease such as Molykote G-5008 is a non-conductive silicone that seals electrical connectors, boots and terminals against moisture and corrosion; DC HVG high vacuum grease seals and lubricates vacuum joints, stopcocks and O-rings. Both are silicone, and silicone residue on parts that will be painted, coated or bonded causes adhesion failures and surface defects such as fish-eyes, so keep them away from paint shops and bonding areas or use a non-silicone grease there.