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🔧 Slick, smooth, and startup-ready—don’t let your engine miss a beat!
Permatex 81950 Ultra Slick Engine Assembly Lube is a high-viscosity, OEM-spec lubricant designed to protect engine components from scuffing and galling during initial startup. Its vibrant red color ensures precise application on critical parts like bearings and camshafts, making it an essential tool for professionals and enthusiasts rebuilding or assembling engines.

| ASIN | B000HBNVSK |
| Best Sellers Rank | #2,611 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Assembly Lubricants |
| Brand | Permatex |
| Brand Name | Permatex |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 9,891 Reviews |
| Flash Point | 550 Degrees Fahrenheit |
| Global Trade Identification Number | 00686226819505 |
| Included Components | Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red |
| Item Form | Liquid |
| Item Type Name | Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red |
| Item Weight | 0.29 Pounds |
| Liquid Volume | 130 Milliliters |
| Manufacturer | Permatex |
| Material | Plastic |
| Model Number | 81950 |
| Number of Items | 1 |
| Package Information | Bottle |
| Part Number | 81950 |
| Recommended Uses For Product | Automotive |
| SAE J300 Viscosity Grade | 50 |
| Specific Uses For Product | Fleet and plant maintenance. |
| UPC | 686226819505 |
| Unit Count | 4.0 Fluid Ounces |
| Viscosity | High |
| Viscosity Level | High |
| Warranty Description | Warranty |
K**Y
Useful engine assembly lube
I've been using the Permatex 81950 for a while now and really like how smoothly my engine parts go together. it's handy to keep on hand during rebuilds. the red color makes it easy to see where I've applied it. definitely a good addition for anyone working on engine projects. it helps parts turn easily without any hassle. happy with the quality and how it performs during assembly.
K**S
High-Performance Engine Lube for Smooth Assembly
I was initially surprised by the size of the 4 oz. bottle, but don't let that fool you - a little of this engine lube goes a long way. As I appkied it, I was impressed by how effortlessly it coated the engine parts, promoting a perfect fit with each piece. This high-quality lube pplayed a crucial role in reducing friction during assembly, simplifying the entire process. Additionally, the vibrant red color not only adds a fun touch but also serves a practical purpose by clearly indicating where it has been applied, preventing any areas from being overlooked.
N**G
Useful engine assembly lube for projects
I found that the Permatex 81950 Ultra Slick engine assembly lube works pretty well when I'm working on car repairs in my garage. It's handy to have on hand to make sure parts slide together smoothly during rebuilds. The 4 oz bottle lasts quite a while and the red formula helps me see where I’ve applied it. I’ve used it during my last few engine projects, and it’s made assembly a bit easier. Glad I picked this up for my toolkit.
J**F
Handy little tube for engine work
Actually grabbed this for my dorm bc my roommate and i are rebuilding an old motorcycle engine in the parking lot behind our building. Ultra slick is a good name for it. This stuff clings hard to the parts so I’m not stressing while we spin the crank and check clearances. I can see it staying put on cam lobes and bearings, even when we keep stopping to look things up on YouTube. The red color helps a ton when I’m tired and double checking what I hit and what I missed. Tube is small but goes a long way, and it doesn’t make a giant mess on our tiny workbench. Made me weirdly glad we didn’t cheap out.
R**T
Sticks well, good value.
Works well, sticks to metal, easy to apply. My engine builder uses this exclusively.
E**S
Handy little tube for engine builds
Fresh tube of this lives in the top drawer by my register because customers ask for it when theyre rebuilding small block engines in their garages. I bought it for my own mower and shop compressor tear downs. The nozzle makes it easy to run a thin bead on cam lobes and bearings without dripping everywhere. I like that the red color lets me see exactly where I put it when im working under bad shop lighting. Used it during a Saturday rush on a customers leaky old tractor engine and it stayed put while we buttoned everything up. Good stuff for slow first startups after a rebuild.
T**N
Easy engine reassembly with this assembly lube
Certainly, using this product made my engine inspection much smoother. I applied it to the main bearings and caps while the engine was still in the truck, which simplified the process. After reinstalling everything and tightening the bolts, I started the engine and was happy to hear it run quietly and smoothly. It gave me a good sense of confidence during reassembly. I'm glad I decided to include it in my tune-up routine.
B**K
Slicker than snot
Works great!
N**X
Standard issue
Lovely sticky slick engine lube. Great tack adherence. Pretty much the benchmark if building a fresh engine.
S**S
Très bon produit
Le produit lui même me semble parfait pour remonter un moteur. L'huile adhère très bien aux surfaces, pas besoin d'en mettre des tonnes. On peut faire plusieurs moteurs sans problème. Le produit est visible une fois en place, on sait si on l'a mis ou pas. Le seul reproche c'est le bouchon verseur qui pourrait être plus pratique, là on a un système qui évite d'avoir un bouchon qui se balade mais c'est pas des plus pratique pour étaler du produit précisement.
X**C
Buena calidad
Necesario para montajes de motores nuevos
T**.
Sehr schmierige Angelegenheit - Ironie
Top Ware, gerne auch beim nächsten Getriebe- oder Motor-Zusammenbau.
F**A
Consiglio
Ottimo lubrificante per montaggio di alberi motori,alberi a camme ecc
Trustpilot
1 week ago
2 weeks ago