Vapor Canister Vent Solenoid O-Ring Lubricant?

Tiny
NIGHTHAWK4570
  • MEMBER
  • 2001 FORD RANGER
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 277,000 MILES
For installation of the vapor canister vent solenoid, what type of o-ring lubricant should be used? Silicone-based, PTFE-based, etc? MERPOL O-Ring Seal Lubricant ESE-M99B144-B is what Ford specifies to use, but I've not been able to find that for sale and can't find much information about it searching online.
Tuesday, July 15th, 2025 AT 10:02 PM

3 Replies

Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
The Ford stuff is an old lubricant spec. I use synthetic lube on them. Silicone grease would work as does Super Lube O-Ring lube (or just the standard Super Lube). It just has to let it slip. Just don't use a common petroleum-based lube, that can damage the O-Ring.
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Wednesday, July 16th, 2025 AT 12:38 AM
Tiny
NIGHTHAWK4570
  • MEMBER
  • 24 POSTS
Thank you for responding so quickly. So, would dielectric/spark plug boot grease be suitable to use?
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Wednesday, July 16th, 2025 AT 4:54 AM
Tiny
STEVE W.
  • MECHANIC
  • 15,233 POSTS
That is usually petroleum based, not what I would want on an Oring. Some parts stores have small packets of silicone grease on the counter, used for brake slide pins.
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Wednesday, July 16th, 2025 AT 8:54 AM

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