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Dielectric Grease for Electrical Connectors, 2 oz.

Dielectric Grease for Electrical Connectors, 2 oz.

Item # 11755
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Accessories and Parts 11755 - Dielectric Grease - LubriMatic
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Protect your electrical connections with this specialized formula that combats corrosion from water damage. Electrical Contact Grease comes in a 2 oz. tube. 1-800-940-8924 to order LubriMatic accessories and parts part number 11755 or order online at Free expert support on all LubriMatic products. Guaranteed Lowest Price and Fastest Shipping for Dielectric Grease for Electrical Connectors, 2 oz.. Accessories and Parts reviews from real customers.
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LubriMatic Accessories and Parts - 11755

  • Trailer Wiring
  • Wiring
  • Dielectric Grease
  • LubriMatic

Protect your electrical connections with this specialized formula that combats corrosion from water damage. Electrical Contact Grease comes in a 2 oz. tube.

  • Helps prevent electrical failures caused by corrosion and moisture
  • Water resistant formulation sheds moisture and will not wash away
  • Protects bulbs, sockets, t-connector plugs and trailer connectors
  • 2 oz. Bottle
  • Dropping Point: >550 degrees F

Using electrical contact grease increases reliability and the life of the connection by preventing corrosion and sealing the connection.

11755 Lubrimatic Electrical Contact Grease

Video of Dielectric Grease for Electrical Connectors, 2 oz.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for LubriMatic Electrical Connector Dielectric Grease Review

Hi there, maintenance-oriented haulers today. Today we're going to be taking a look at Librimatic's Dielectric Contact Grease. So we've been experiencing some issues with our travel trailer here. When we plug in, sometimes our lights are working, sometimes they're not. It's a little bit finicky. If we jiggle the connector, it usually works.Most of the time, this is caused by poor contacts inside your connector and that's usually due to corrosion.

You can see here that this connector is actually got some corrosion on it. And the plastic's actually starting to deform because once you get this corrosion on here, it's possible that you can still have contact enough to eliminate your lights and operate your functions. But this corrosion is going to cause extra resistance here, which is going to cause it to build heat. And as it builds up heat, you can see the plastic's deformed due to the excessive heat that it's caused. And eventually over time, that heat is going to cause further damage and fretting onto our connectors here.

And eventually, it's going to get so bad that we're not even going to be able to fix it.So to get on top of this, before it gets that bad, we want to clean out all this corrosion and we want to seal it up to prevent it from happening again. And that's why we're going to be using the Dielectric Grease here. Now there's a lot of different ways you can clean out corrosion. Usually something acidic like vinegar and water mixture works great. Or you can just go to your automotive store and pick up electrical contact cleaner to clean it out.

You can also use a bristle brush to clean it out. But you do want to be careful when using any brushes down here because if you spread those contacts apart, you may spread them apart too far to where they're not going to touch onto the terminals once you plug it in and then you need to replace the pins, potentially the whole connector.So we're just going to spray our contact cleaner in here. And we're using this contact cleaner because it is a quick-dry contact solution. Because we don't want any moisture or anything left behind. This is designed to dry out very rapidly so we don't leave any moisture behind.So we use the contact cleaner.

We still got a little bit of corrosion in there. So we're going to take our bristle brush to clean that up. Now you'll notice I'm not sticking it down in there, we don't want to spread those terminals out. So we're just kind of rubbing it along the top to get that corrosion out of there. A toothbrush works very well as well, if you've got an old one laying around. But if you don't and you need a bristled rush, you can get one just like I got here at And we're just trying to get all that out of there.Now that all of our contacts have been cleaned up, we're going to take the Dielectric Grease and we're going to apply it generously to all of our pins here. So we want to try to keep out any moisture from getting in there. And we're not just using any grease. We are using dielectric grease because dielectric grease is specifically designed for this application as it does not conduct electricity so we don't have to worry about any of our contacts shorting out between one another. And then it has the other properties that grease has where it coats up the surface and helps keep out moisture, sealing it all in. So now that we've got that done, we're ready to plug it in to our trailer and hit the road. And we don't need to clean any of this up, we can just leave it there. We're trying to seal out moisture and dirt.On the other side here on our truck, it's a good idea to clean these pins out as well. So we don't want to transfer any of the corrosion that may be on these or the other ones, back and forth. And we can also put the dielectric on these pins as well, to help further seal up and protect this side.Now that we've cleaned up each end and got them greased, we can go ahead and plug them together. Now we discussed earlier about how the grease is non-conductive because that's what we want. We don't want any of our pins to be shorting out with the other ones next to it. But that doesn't mean that it's going to cause any issues with the connections between our connector here on our trailer and the one on our truck, because the pins are designed to be a nice tight fit. So when it goes in, we do get metal to metal contact as it pushes that grease out of the way. Now it's when during cleaning, if you do stick something down in there, you can spread those terminals apart. And when you go together, they may not touch that because you have damaged pins. Now to replace the pins as long as everything's okay, our grease is not going to affect us because that terminal is going to have good contact.And it's not only great for the seven poles like we showed you earlier, but it's going to work on all of your trailer connectors, especially ones that are exposed to the elements like this. Keeping them coated is going to help keep corrosion off of them to ensure a longer lasting connection. So your four poles, your five poles, basically anything here on the outside. And it's also highly recommended for you flat towers out there. So your six pole ends and your seven pole where it plugs into your motor home. Keep those all greased up as well, because we don't want any connection issues with our vehicle when we're flat towing it down the road.And while you're at it, don't forget about the lights on your trailer. All these connection points as well are susceptible to corrosion so we can keep all of those clean. And if you have incandescent bulbs on your vehicle, it's recommended to put them on those as well.Pretty much any connector that does not have a weather pack seal, which has a rubberized seal around it. You would want to put this grease on because they have no form of weather protection. And that's what this is doing for us, is providing us with a coat of weather protection.All in all, this is going to be an inexpensive way to keep all of your electrical components operating properly and avoiding expensive wiring repairs down the road. And that completes our look at Lubrimatic's Dielectric Contact Grease.

Customer Reviews

Dielectric Grease for Electrical Connectors, 2 oz. - 11755

Average Customer Rating:  4.8 out of 5 stars   (1011 Customer Reviews)

Protect your electrical connections with this specialized formula that combats corrosion from water damage. Electrical Contact Grease comes in a 2 oz. tube.


Ordered hitch receiver with wiring for bike rack installation on 2019 Ford Explorer. Everything arrived in less than a week. Crawled under the car with my burly son and finished the installation in about an hour. Toughest part was getting the exhaust hangers off. Didn't have a tool for that. Online installation video was a big help. Hitch frame rubs against right side exhaust hanger, hence the four star rating instead of five. Exhaust still appears to be level and no weird noises, so not an issue. Get the little plug in light tester. It's worth it, then keep it in the glove box. Haven't purchased bike rack yet, but no concerns about the hitch.


For the installation the instructions were good, but watching some videos made it much easier to take apart a brand new car. All went well. Installed on a 2020 Chevy Equinox 2.0


Used GE dielectrics grease before. This seems to be not as thick.
Make big hole so it comes out better. Seems to work. I use it for outdoor electrical connections. Especially batteries in lights and grill igniter.

Thomas - 04/17/2022


Used on my fifth wheel plug I installed and have had no problems with the connection. Also worked great on a connector I was having intermittent issues with. I would highly recommend this product.

Still working great after one year of use !
Mark - 03/28/2022


I have a 2003 F-150 and wiring parts I needed were a perfect fit. The videos were very helpful and informative. Now i know that there are relays and fuses that control trailer lights even through the truck lights are working fine.


I use this for more than my trailer lights wire harness to my car. Great stuff. Electrical connections stay connected!


The price I got was excellent compared to what the dealer would charge. Thanks to the etrailer installation videos, i was able to do it without difficulty and this is the first time i installed an item like this.


Works just as expected. etrailer is my go to for all things trailering.

Great Grease, great shipping and customer service!
Joshua - 05/16/2022


About a year ago, I purchased a brake controller and parts to install a 7-pin trailer connector on my Ford Edge. The installation all went well and I used the Dielectric Grease to seal the wire connections at the connector. My four-star rating was given simply because I don't know if the grease is working as I hope it is. Time will tell more years down the road.
As a side note, I made an additional bracket to enclose both connectors (4-pin & 7-Ping, see photo) to keep the 4-Pin connector from sliding out of place because it was only retained on three sides without my bracket.


If you're tired of poor trailer electrical connections you need to get some of this grease!


fantastic product all lamps started working with no failures.silicone made all connection problems go away.


This stuff really works to keep my tow vehicle and toad electrically connected. I used to spend a lot of time cleaning and redoing those troublesome electrical connections especially in wet weather. That is all behind me now. (Pun intended). The tube is strong to reside safely and conveniently in my tool box so it is readily available for future use.


This is a great product for keeping electrical connections dry and prevent rusting.
Easy to apply and last a long time.

I have not had to apply more as it is still working great.
Michael - 03/02/2022


This size tube is just right since I have multiple trailer connections to apply this to. Use of this Dielectric Grease is a must for good connections that last a long time.


Haven't had issues with connection or corrosion, 1 year post install. Probably a bit large of a container for 1 simple connection. Might be worth selling a single use option. Less waste?


Product is exactly what I needed to get my 5th wheel to connect to my pickup truck.


Keeps trailer connections clean and working properly.


I like the idea of keeping connectors protected from the elements.


etrailer video showed how using dielectric contact grease wold be most helpful to make the under bed electric connections as water resistant as possible. I would never have know about it unless I watched the video. Great advice.

I am planning to refresh the grease every year.

The makes your life easier. No hassle connections and easy to disconnect.
Wayne B - 02/03/2021


We just purchased a 2019 Hyundai Santa Fe as our retirement vehicle for traveling. We wanted to install cargo accessories but the dealer prices were WAY to high. After researching for several days we found The prices were the best we found and the service was outstanding! We installed a Thule roof rack system that fits flawlessly and allows the panorama sun roof to plenty of roof to operate. The videos made in really easy to install. We also installed a trailer hitch system. The Tekonsha Trailer Wiring kit was also a piece of cake to install. If you're hesitant to work on electrical systems, there's no need to be afraid. It's actually easier than it looks in the video.
The Curt Trailer Hitch gave me major headaches. The delivery company banged the box up pretty badly. Apparently it tweaked the hitch just enough so that the holes were misaligned. No problem, after talking me through the installation one more time to be sure it was damaged, they shipped a new unit. The second hitch went in fine. It took a while, and it's not as easy as it looks in the video, but I'm 67 years old I did the installation myself...
Overall, I gave five stars because the price match guaranty makes it a wise choice price wise. he videos are a big help during installation. But the real difference is the service. A lot of folks provide good service to make a sale, but etrailer goes the extra distance to provide great service afterwards. That's unique! Thanks etrailer!


Excellent product to prevent battery and plug wire oxidation. Treats any 12 volt connection to prevent bad connections later.


Keeps connections clean works well


Dielectric grease


Install went exactly as described in the installation video, I did the work myself with a set of ramps to elevate half the van at a time.


Affordable protection for circuits that are exposed to weather and grime. Handy "palm size" tube makes application easy and less wasted product. Glad to have found this electrical grease easily available, so I can use it generously anywhere on vehicle(s) that need corrosion lubrication.

Show More Reviews

Ask the Experts about this LubriMatic Accessories and Parts

  • Troubleshooting Lippert Electric Motorcoach Steps on 2012 Tiffin Allegro
    Since your electric motorcoach steps seem to be mechanically okay (the linkage and motor appear to function properly) I would suspect either a problem with the 12V power wiring to the steps or with the connectors that link the various parts. After 5 years in use these connections could loosen up and/or develop some corrosion. The faint click could be due to a weak power connection that is not able to deliver quite enough power to the motor to activate the steps. Check your main power connections,...
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  • Trailer Brakes Lockup While in Reverse With Different Trailers
    It sounds to me like the reverse light and brake output signal wires are touching one another. The two wires are likely shorting one another at the rear of the vehicle on the trailer connector or in the wiring harness. The first thing you will want to do is use a bit of electrical cleaner on the metal pins inside the connector followed by a thin line of dielectric grease like part # 11755. Once the connector has been cleaned you will want to move to the rear of the connector and give...
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  • Can Grounding Issues Affect Lighting and Trailer Brake Functions on 2001 GMC Sierra 2500 HD
    Your recently installed audio amplifier should have no interaction with the vehicle or trailer lighting since it should be directly connected only to the battery +12V and ground. There should be no common wiring between the audio and lighting systems. Your trailer lights being incandescent should have no bearings on this issue. What is the error message on your trailer brake controller? If it indicates that it has lost connection to the trailer brake circuit then there could be a corrosion...
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  • Troubleshooting Blown Fuses on Running Light Circuit of 7-Way Socket
    The easiest way to troubleshoot your trailer lighting functions is when it is not connected to the tow vehicle. Apply 12V power from the truck's battery or a well-charged spare if you have in the garage directly to the contacts on the trailer plug. Direct power input to the trailer plug lets you test the trailer running/clearance/license plate light function in isolation, without any possible interaction with the vehicle. A set of jumper cables and two short lengths of 10- or 12-gauge wire...
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  • Troubleshooting Left Tail Light on Vehicle Not Working Properly After Harness Installation
    It definitely sounds like there is some connectivity between the two functions that should not be there. I recommend cleaning your terminals and using dielectric grease # 11755 to help the electrical connection of the correct function while mitigating the sharing of function due to moisture, dirt or debris. You can ensure it is simply a function issue by just disconnecting the harness and using a small jump wire to test each function.
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  • Can Electric Trailer Tongue Jack Still Function Without 12V Electrical Power
    If an electric trailer jack cannot get the 12V operating power it needs to function it can still be operated using the included manual crank. This is shown in the linked example review video (and an installation video is linked too). The manual operating crank is used at the top of the jack housing, by removing the rubber plug. The power this or any other electric jack requires to operate will vary depending on the load. At the maximum rated lift capacity any jack will draw the most power....
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  • Non-Conductive Grease Recommendation for Pins of Connector to Protect from Elements
    Dielectric grease like part # 11755 is exactly what you are looking for. This grease is non-conductive and prevents corrosion as well.
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  • Troubleshooting Trailer Right Turn Light That Stops Working When Running Lights Are On
    The lighting issue you describe sounds like a classic case of a bad ground connection. Since running lights remain on continuously (rather than blinking like turn signals or being on only momentarily as with brake lights) they tend to draw more power. This higher current demand will cause a weak/loose ground issue to show up once you turn on your running lights even though the other functions will work okay on their own. What you can do is check your main ground wire on the trailer. This...
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  • Troubleshooting Non-Functioning 5th Wheel Trailer Landing Gear
    There are many potential causes for electric landing gear on a 5th wheel trailer to stop functioning. The most common causes are loose and/or corroded electrical connections, a worn out switch or a battery that can no longer deliver the required current. The best way to troubleshoot the jack power switch and much of the related wiring is to apply power from a fully-charged and appropriately-rated battery directly to the jack motor's terminals. If the jack works when fed power directly...
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  • Can Dielectric Grease Be Used On A/C Electrical Cord Connections
    The first thing I recommend is to clean the prongs on the plugs you mentioned are corroded. You can use light grit sandpapaer to get them clean and then use the dielectric grease, part # 11755. This will help prevent future corrosion and also helps keep dirt out of the connections.
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  • Troubleshooting Brake Light That Comes on with Varying Brightness
    When a trailer light exhibits varying brightness this is usually caused by a grounding issue. If a trailer's main ground is marginal (say for example if it is attached to a rusty spot on the frame) it may pass enough current for some light functions to work properly but not others. Similarly, if the light in question uses its mounting hardware as the ground, rust, grease, primer and paint at that mounting point could cause the same grounding problem. Cleaning the grounding point and re-installing...
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  • Can Butt Connectors Be Used in Place of Quick-Splice Connectors for Installing LED Trailer Lights
    Yes, since all the running/clearance lights on your trailer will be fed by the same circuit you can use butt connectors rather than quick-splice connectors to enable a longer-lasting and more water-resistant connection. Wiring the lights as you described is fine. I also suggest using dielectric grease # 11755 in/on all connectors to prevent entry of water and contaminants that could eventually cause connectivity issues.
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  • Troubleshooting Bestop Power Board Installation
    If new batteries do not correct the issue with your Bestop Power Boards retracting only partially then I suggest you check the wiring on the system. An issue as simple as a slightly loose ground wire could be the cause. Road gremlins like salt can also cause corrosion of electrical contacts and these may require cleaning and re-installation. Even the battery contacts inside the sensor may need cleaning. Any electrical connections can be protected after cleaning by using an application...
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  • Why Is Grease Used in Connection For Installing Trailer Wiring in 2013 Chevy Traverse
    When making all wiring connections it doesn't hurt to use dielectric grease like part # 11755. This helps prevent corrosion and keep out water and debris. It's not an absolute requirement but it can only help.
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  • Is Grease Required When Installing Spark Plugs on Vehicle
    Sounds like you are asking if you should install dielectric grease in any situations when swapping spark plugs. The answer is yes. Basically you want to put it in both sides of the spark plug wires. Where it connects to the coil and where it connects to the spark plug. Do NOT put any on the spark plug electrode though. For grease we have # 11755.
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  • Troubleshooting Trailer Light That Only Works When Handled
    We can help. It sounds like there is a grounding problem with the one light on your trailer. Since the light comes on when you handle it, this suggests that the light's grounding wire (or grounding post, if it uses the post to establish the electrical ground) is not making complete and constant contact with the trailer frame. Grounds must be made to clean bare metal, a surface free of paint, primer, grease, rust, etc. You can try sanding the mounting point for the light (or for the ground...
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  • How to Prevent Water from Entering 6-Pole Vehicle Socket When Not in Use
    I understand the circumstances and the need you describe but unfortunately we do not have an add-on protective cover for a 6-pole. You might try a healthy application of dielectric grease # 11755 to prevent shorts from moisture entering the socket. This would require periodic re-application but it would work to keep water out of the socket.
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  • Are Magnet Wires on Dexter Electric Drum Brake Polarized as Positive & Negative
    No, on an electric drum brake assembly the magnet wires are NOT polarized so either wire can be attached to the frame as ground or used for the +12V brake circuit. Do your best to make sure the ground wire is attached to a rust-free, grease-free bare metal surface. An application of dielectric grease like # 11755 over that secure ground connection can help prevent the entry of moisture that can lead to corrosion.
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  • How to Correct Weak Ground Connection on Vehicle and Trailer
    A hitch ball does not make a good ground connection for trailer lighting functions. The fact that the lights work for a bit after you hit a bump with the hitched trailer tells us that somewhere in your trailer and vehicle wiring there is an intermittent ground connection. This kind of problem usually has a fairly simple fix. I suggest you locate the tow vehicle's wiring harness ground wire. This white wire needs to be firmly attached to a clean bare metal surface on the vehicle. On the...
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  • What Is The Vaseline Looking Stuff In The OEM Plug And Connector?
    What you found in the OEM plug and connector is not Vaseline, it is dielectric grease. It not only won't hurt the connector, it will help it. We use the Dielectric Grease for Electrical Connectors, 2 oz. # 11755 on the majority of our installs because it helps prevent electrical failures by keeping dirt, debris, and moisture that causes corrosion out of the connection.
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  • Troubleshooting Non-Functioning Trailer Turn Signals
    In standard RV-type trailer wiring the turn signals and brake light signals are combined onto the green wire for the passenger side lights and on the yellow wire for the driver side lights. If the vehicle and trailer are wired correctly pressing the vehicle brake pedal should deliver a brake light signal to both sides of the trailer, on both the green and yellow wires. Activating the turn signals should only affect one side of the trailer. Quite often when trailer lights misbehave the...
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  • Troubleshooting Running Lights on Trailer Towed by 2014 Nissan Armada
    Most of the time, when trailer running lights do not work but all other lights do work properly the cause is a weak ground connection. Since running lights stay on continuously, unlike stop/turn lights, they draw more current and a weak ground may allow the other functions to operate correctly but not pass enough continuous current for the running lights. The fix is simple in this case. Find your trailer's main ground wire (and do the same thing on the wiring harness on the Armada) and...
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  • Troubleshooting No Running Lights on Trailer Towed by 2014 Dodge Ram
    If your trailer's turn and brake lights work properly but the running/tail lights do not this usually indicates a ground problem on the trailer or vehicle wiring harnesses. If there is a weak ground connection at either the vehicle or trailer the wiring may be able to deliver enough power to operate functions like turn and brake lights (which do not remain on continuously) but not be able to deliver the higher current required by tail lights, which remain on continuously. First check...
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  • Troubleshooting Trailer Wiring and Non-Functioning Running Lights with Honda Odyssey 4-Pole Harness
    I could not find purchase history based on your email address so I do not know which particular trailer wiring harness you have but I can still help you troubleshooting it. Most often when one lighting function fails to operate while other do operate correctly the cause is related to a grounding issue. What can happen is that if the ground is weak it will allow enough current for some light functions to operate but not pass enough current to allow all to work at once. This usually does...
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