Product Description
Udder Butter
Some greases chase a reputation. This one already has one.
If you've spent time in this hobby, there's a good chance you've heard of Udder Butter, long before you ever saw the name on our site. One of the go-to greases across the hobby, not because it does one thing perfectly, but because it does almost everything better than most of the specialty greases built for just one job, across a genuinely wide range of RC applications rather than one narrow niche.
It's not a do-it-all grease, and we won't pretend otherwise. What it is, is a do-most, and it does most of those jobs better. It handles gears, axles, transmissions, bearings, shock linkages, gaskets, seals, O-rings, swing arm pivots, portals, differentials, and much more. There are a couple of places we'd point you elsewhere: genuinely massive vehicles in the eighty pound and up range, closer to small ATVs than RC, and inside a tenth-scale ball differential specifically, where the pressures involved can be more extreme than what this grease is built for. Outside of those, it's hard to find a spot in the hobby where Udder Butter doesn't belong.
A quick but important distinction: waterproof grease doesn't mean it waterproofs things, it means the grease itself is waterproof. It won't mix with, break down, or wash away in water, so it keeps doing its job even in wet or fully submerged conditions, including saltwater.
This isn't a product we threw together and left alone. Udder Butter is now on its fourth formula, refined over roughly a decade and a half of real use across the hobby, each version sharpening what already worked rather than starting over.
Udder Butter comes in three sizes, and which one you reach for depends on how you work. The 2lb tub and 8oz container are the better tool for the fill-and-wipe technique, since scooping generously and removing the excess is easy whether you use a finger or a glove. The 40ml syringe trades that flexibility for pure convenience, dispensing precisely where you want it with no scooping at all, though once it's out, it's not going back in so easily, so it suits smaller, more targeted jobs better than a full fill-and-wipe process.
And yeah, we made it the color of actual butter.
Some tips from the team:
- Old habits die hard here. Piling on grease, packing housings tight, leaning on extra volume for extra protection, or counting on excess grease to settle and reapply itself is a perfectly reasonable instinct with most greases, but Udder Butter plays by different rules, and holding onto that old instinct means never actually seeing what makes it different.
- On gears, the goal isn't a coating, it's a fill. Wipe it directly over the teeth to pack them, then take a second pass wiping away the excess, until the gear looks like it never had teeth machined into it at all.
- Anywhere else on the part where you're just after rust and corrosion protection rather than a friction point, the metal only needs to glisten, no visible buildup required. Udder Butter is remarkably tacky and adhesive, but it won't cling to itself, so that thin layer is the ideal application, by design.
Features:
- Does most jobs in the hobby better than the specialty grease built for just that one job
- Safe for all rubbers, plastics, and materials common in RC, won't swell O-rings or degrade plastics the way many automotive/marine greases can
- Excellent for gasket seals and O-ring lubrication, staying consistent without altering O-ring behavior
- The grease itself is fully waterproof, won't mix with, break down, or wash away in water, including saltwater
- Significantly lower cost per ounce than typical greases in the industry, and used so sparingly that the real cost per application drops even further
- Now in its fourth formula, refined over roughly a decade and a half of real-world use
- Available in three sizes: 2lb tub, 8oz container, and 40ml syringe
Ideal Applications:
- Gears, axles, transmissions, bearings
- Shock linkages, gaskets, seals, O-rings
- Swing arm pivots, portals, differentials, and much more
- Not recommended for vehicles in the eighty pound and up range, closer to small ATVs than RC, or inside a tenth-scale ball differential specifically, where pressures can exceed what this grease is built for
Product Videos
Videos Hide Videos Show Videos
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Let's take a DEEP DIVE into the CowRC Lubricants!
Welcome to CowRC University! Our goal is to provide you an in ...
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Choosing the proper lubricant
This video serves as a comprehensive guide to selecting the ri...
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The Proof Is In The Butter! Udder Butter Super Waterproof Grease!
Edited & Produced By CowRC Factory Team Driver Zack Cater
Custom Field
Product Reviews
21 Reviews Hide Reviews Show Reviews
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The best stuff for RCs
I love this stuff, its great on your external diff gears and other moving grinding RC parts. I actually used it on my trx4m gearbox because the gears were so loud, but a touch of this stuff and its way quieter and smoother. honestly if you run any RCs you should be buying all of the CowRC products
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Utter Butter
I use the Utter Butter on all my RC’s diffs and also repack the bearings with it. It’s water resistant so the bearings won’t rust, I also put a small amount on the suspension “pins” so the pins don’t rust and less resistant in motion.
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Under Butter
Great stuff... I ordered a magnetic work mat for my bench and received a sample of this and 2 other products... just as I was installing a locker in the rear diff of of 1 of my rigs. I tried, it liked it, it's still running smooth and quiet so I ordered the 8oz can!!!
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WOW!
This udder butter is one of the best lubricants I've ever worked with and I was an automotive technician for over a decade. I use this stuff anywhere that I can and it never let's me down. I also love that the more I buy the cheaper it is. So if you know you'll use it then buy the biggest container you can afford.
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udder butter
This is the best product that ive used. it works in my crawler and my basher, Doesnt matter if you creepying or doing 70 it works great
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Udder Butter
There was a noticeable reduction in noise from 4wd after applying to transmission gears and out drives. Also, it seemed to hold up after a day of racing. Impressed.
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Best
The best
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Utter butter
I been in this hobby since the 90s and this is hands down the best rc grease I have ever tried, sticks to gears better then anything I have ever tried
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Best grease we’ve used
This is so far the best differential grease we’ve used so far. Really love the container, and very affordable.