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💙 Stay slick, stay unstoppable—marine-grade grease that never quits!
Sta-Lube SL3121 is a premium blue aluminum complex marine grease designed for extreme water resistance and high-temperature durability. Its polymer-enhanced formula ensures strong adhesion and prevents washout, making it ideal for 4WD vehicles, boat trailers, and marine equipment. Trusted by professionals and rated 4.7 stars, this 14 oz. tub delivers reliable protection in the harshest wet environments.







| ASIN | B000CPJMY8 |
| Best Sellers Rank | #34,879 in Automotive ( See Top 100 in Automotive ) #10 in Heavy Duty Vehicle Greases & Lubricants |
| Brand | Sta-Lube |
| Brand Name | Sta-Lube |
| Container Type | Can |
| Customer Reviews | 4.7 out of 5 stars 911 Reviews |
| Global Trade Identification Number | 30072213312103 |
| Included Components | Grease |
| Item Form | Paste |
| Item Type Name | Marine Boat Trailer And 4 X 4 Wheel Bearing Grease |
| Item Weight | 16 ounces |
| Liquid Volume | 14 Fluid Ounces |
| Manufacturer | Sta-Lube |
| Material | Aluminum |
| Model Number | SL3121 |
| Number of Items | 1 |
| Package Information | Can |
| Part Number | SL3121 |
| Recommended Uses For Product | Water |
| Specific Uses For Product | Marine, Freshwater, Saltwater, 4WD, Boat Trailers |
| UPC | 072213312102 |
| Unit Count | 14.0 Ounce |
| Upper Temperature Rating | 469 Degrees Fahrenheit |
| Viscosity | 21 sq-mm/s |
| Warranty Description | Manufacturer Warranty |
J**O
Reliable choice
I recently used the Sta-Lube SL3121 Water-Resistant Marine Grease to repack the wheel bearings on my boat trailer, and overall, I’m quite satisfied. The grease has a thick, tacky consistency and is notably water-resistant, which is crucial for marine applications. After several trips, the bearings continue to perform smoothly without any signs of water intrusion. However, I noticed that the grease is a bit more challenging to clean off compared to others I’ve used, likely due to its water-resistant properties. Despite this minor inconvenience, I believe it’s a reliable choice for protecting trailer bearings in wet conditions.
D**N
Good product at reasonable price
I got this to lube bearings on a mini bike. It seems to work great. I can also use it on anything that needs grease that might get wet.
S**7
Great for Vintage Bicycles
I use this for greasing all the bearings (bottom bracket, hubs, headset, pedals etc.) of my vintage touring bicycles. It works very well for this purpose, as the grease seems to resist moisture exposure (rain storms, puddles) better than traditional wheel bearing grease does. The consistency of this grease is slightly different (thicker) than traditional bearing grease. I've noticed no difference in rolling resistance compared to using regular grease. Good stuff!
T**N
Good.
Good product.
B**4
Great
Great
T**Y
Does what it claims.
Best grease I have ever used on my boat trailer. Will not wash out even after several launches. Boat is used exclusively in salt water and I usually had to replace wheel bearings every 8 to 10 months. More than a year since using this grease and the wheel bearings still have no pits or signs of wear..
D**T
A must have for bearings that will go long distances
My first marine grade grease was bad because it wasn't rated for long road trips. This passes all concerns as it is marine rated and great for trailer bearings. No issues on a 2000 mile trip.
A**R
Great price / good quality
I used it on my outboard steering, worked nicely.
M**Z
De buena calidad
Es tal cual como se muestra en las imágenes
H**O
Muito boa
Realmente funciona para as aplicações indicadas
E**N
Excelente
Excelwnte
E**Z
Engrase e impermeabilización
Utilizado en el engrase exigente de bicicleta de montaña
J**E
Formula mejorada
Muy buena grasa, cambio su formula para mejorar, ahora es de complejo de sulfonato de calcio. Lo mejor para alta temperatura y resistencia al agua.
Trustpilot
3 days ago
2 weeks ago