Super Lube 56204 O-Ring Silicone Lubricant, 4 oz Bottle

Super Lube 56204 is a liquid O-ring lubricant: a specially formulated, non-curing silicone fluid for lubricating, sealing and conditioning O-rings and the regulator and valve components around them. A light coat at installation helps protect an O-ring from abrasion, pinching and cutting, helps it seat properly and speeds assembly. In dynamic pneumatic applications, Super Lube says a lubricated O-ring extends equipment service life, and in vacuum service the fluid fills the gland’s surface gaps to help reduce the overall leak rate.

Key features

• Clear silicone fluid, 5,000 cSt at 25°C; non-curing
• -58°F to 392°F (-50°C to 200°C); dielectric strength 18 kV/mm
• Waterproof; seals out moisture; resists oxidation; heat stable
• Published compatibility chart: rated excellent with EPDM, nitrile (NBR), FKM/Viton, neoprene, natural rubber, butyl and most plastics
• NSF H1 (#156449), Kosher; PFAS-free per super-lube.com; made in USA

Where to use it

Static and dynamic O-rings, pneumatic systems, seals, valves, pressure plug valves, water softener and faucet valves, pool pump and filter seals, rubber gaskets, weather stripping and food-processing equipment. The liquid form flows into grooves and coats small O-rings evenly, which makes it handy for filter housings and valve cartridges.

How to use

1. Clean the O-ring, its groove and the mating surfaces; remove grit and old lubricant.
2. Apply evenly to the O-ring and surfaces; a thin film is enough.
3. Seat the O-ring without rolling or twisting it, then assemble.

Compatibility and cautions

Do not use it on silicone rubber O-rings (VMQ, MQ, FMQ, PMQ, VMFQ): Super Lube rates them not compatible. POM (Delrin) and PPS are rated good rather than excellent. Super Lube’s data sheet describes the fluid as safe in potable water; note that NSF H1 covers incidental food contact and is not an NSF/ANSI 61 drinking-water certification, so if a filter or appliance maker specifies a particular lubricant, use that. Read the SDS.

Choosing between O-ring lubricant and O-ring grease

Liquid 56204 suits small O-rings and quick assembly. For a heavier film that stays put on large or vertical seals and vacuum chambers, choose Super Lube 93016 O-Ring Silicone Grease (NLGI 2, 14.1 oz canister). Buying for a service van or a crew? See the 56204 3-pack. All options are in our O-ring lubricant collection.